what are you trying to do?
what sort of music?
how will you control this?
how will you listen to this?
how much is your budget? start up and long term
do you think you are missing something - is this just a "I have no clue and threw these in here and I am lost post"?
or is it just a hunch that you have missed something and you can't spot it?
have you bought any of this yet?
what other equipment do you have? that you want/need to interface with this?

I wrote this and then clicked on the rack to see if I could offer any immediate advice based on the actual modules in the rack - and the link does not match - please look for @Lugia's description of how to fix this - it's in the top few posts somewhere - I think you just have to refresh and save the correct page so that the in screenshot is updated