Thanks to you two. I don't really think I'm going to do any more changes on the setup because right now it has somehow reached my financial limit at the time. Especially the Intellijel case. It looks handy though but I right now it's way out.
Regarding performability. I'm actually programming a sequencer right now, that generates CV and is connected via a Motu Audio interface. It's more or less an additional 10 channel VC-generator.
I'm really thankful for your advice!
Cheers
Seb