So...
I have changed the setup I'm aiming for quite a lot :
ModularGrid Rack

I already have the mantis case and the following modules :
Doepfer A-119 to input other synths. This will eventually be removed once I have some sound sources in the rack.
Erica Synths Black Hole DSP & Pico RND.
MI Veils.
Intellijel Triatt.

Any advice / opinions on this version? The hardware I have so far (cf first post) still holds.

Thank you you expert knob twiddlers!