I am sorry if my message/feedback was perhaps a little unclear. My concern here for your above rack is, do you have already all the displayed modules, mainly worried about the Cwejman modules because, as already mentioned, they are no longer obtainable. If you already have them, then well that's seriously fantastic :-) If not yet, perhaps you might want to reconsider your planned rack to make it more realistic because just a Maths and a Delay module (be it the Verbos one or another one), might be a bit meagre in combination with your already existing Cwejman SW1MK2; but it also depends on what you exactly want.
There are quite a few delay modules and of course the perfect way of discovering the "perfect" delay module that might fit you is, by going to a local dealer and try them all out (or as many as possible). Naturally because of Covid that might be difficult at the moment or not possible or if you don't have a too nearby local dealer, you might be "forced" to buy it "blindly" so to speak.
I don't know them all or what I rather mean is, I don't have experience with most of them, but let's give it a try to get an overview of available delays:
- Doepfer has a few whereby I think the A-188-x is the most well-known, based on the BBD principle (Bucket Brigade Device) whereby Doepfer offers several different modules by offering several different "stages". I own the A-188-1 with 1024 stages, in one way I like it, I guess because of BBD however I feel it's a module that's a bit difficult to get that properly under control but that might be just me, not really knowing how to use it properly ;-)
- 2hp has a "Delay" module, if you want it small :-) I prefer modules to be at least 4 or 6 HP, so for me this wouldn't be comfortable but if you want to save space in your rack...?
- 4ms has the Dual Looping Delay, no experience with it, might be worth to check out though
- ACL, the VC Dual Delay module, not sure if this one is sold out, it's on my wish list though
Alright Devices - Chronoblob2, funny name but other than that i don't know it
Analogue Systems has a few delay modules, as far as I know non-Eurorack so that's a pity, not sure yet if they have already a Eurorack compatible delay module, this might be interesting in the future when they do so
Animal Factory Amplification has a module called Coma Reactor Module, just because of that name it's on my wish list but then again, there is so many on my wish list ;-) Not sure about this one, might be interesting
Audio Damage has a few (ADM15, 16 & 17)
Befaco Crush Delay v2 or nowadays v3, I have that one and... I am not so sure what to think of this one, if you want a more distorted delay, this might be an interesting one, if you look for a nice clear delay effect... I don't think I would go for this one
Dreadbox - Nostalgia, for the price-performance, I think this might be very interesting, not sure about its sound quality though
Erica Synths has a few, including Black Stereo Delay, Fusion Delay (using a tube), Pico DSP (if you like it small, just 3 HP) and now recently the Black BBD, same principle as the Doepfer, also a BBD. If I remember a post here correctly this one might be interesting if you are looking for a delay based on the BBD principle, seems to be easier to get it under control than the Doepfer one, but that again might be just my own clumsiness ;-)
Eventide is planning to come with the Euro DDL, that looks like a very interesting option to me, pity it's not available yet though
Folktek has Conduit
Intellijel the Rainmaker, if you don't care the 36 HP (and the high price), then this might be your delay valhalla
Make Noise has the Mimeophon, this one I am considering but want to test it first at my local dealer to see if it's indeed as good as the name and reputation goes; knowing Make Noise, I think this might be indeed a very interesting module
Malekko has a quad gate delay, reasonably priced, small in HP (8 HP), so perhaps this is interesting?
MFB from Berlin has the digital delay
Modcan comes with the dual delay, not sure if it's still available
Noise Engineering uses the Imitor Versio to create a delay effect
Pittsburgh Modular calls their the Analogue Replicator
Recovery Effects has the Cutting Room Floor, don't know this one at all
Roland has an LFO/delay module called 572 (from their System 500 series)
Sputnik Modular might have an interesting one for you with the 4-Tap delay/dual crossfader module
Steady State Fate (SSF) has one called Propegate
Synthesis Technology has the E102 Quad Temporarl Shifter, I don't have this module however I have a few modules from Synthesis Technology and their modules are quite interesting, so I wouldn't be surprised if this is a good one too!
T-Rex has the enormous Replicator Tape Echo Module, if Tape Echo is your thing, you need 44 HP space and about a ton of money
Tiptop Audio has Echoz if you want to keep the price reasonable
TouellSkouarn has the Heklev, I don't know this one but I have two other modules of this brand, not sure if that suits... the modules I have so far from TouellSkouarn are good in one particular thing, tons of distortion :-)
Well the Verbos you mentioned yourself already
and the last that comes to mind is the WMD DPLR/Doppler delay module
So quite a few to choose from however it's not easy to advice you which one you should take without more context and even then... I do believe choosing a delay is a pretty personal taste kind of thing.
What I haven't mentioned are the tons of modules that are based on DSP effects, if you count them in as well, wow, so much more to choose from. I mainly focussed here on Delay but even then there are of course several of them already DSP based delays :-)
With DSPs I don't have too much experience, I have the Erica Synths - Black Hole DSP2, that's actually a quite nice one, and it has stereo inputs and stereo outputs; but there are so many of them...
What I also haven't mentioned at all yet, are external effects processors and pedals. I regularly use the Electro-Harmonix Grand Canyon delay pedal, nice one, mono input, stereo output but it's not a Eurorack module. Not sure if it must be a module for you or if you feel a pedal is acceptable as well? Well, the Eventide might be interesting but, at least here in Europe, it's not available on the market yet (the Euro DDL module I mean).
I hope I gave you some ideas. As already mentioned, best I believe is still to test as many as possible at a local dealer, I know not easy at these times...
Good luck with the delay choice besides the rack planning ;-) Kind regards, Garfield.