Thanks for the input! I will definitely not use the Moog Mother 32 as part of a rack case, I'll use it separately on its own working with the case.
I should've been more clear on what I own.
I own the Prophet Rev2, Op-1, 2 pocket operators, the Moog Mother 32, and the novation mininova.
In terms of types of sounds I want to be able to create, I want to be able to have lots of sources of modulation so that I can create more expressive and flexible sounds. I want to be able to have a live setup that I can modulate on the fly during a performance, and for that to be an easy thing to do in the synth workflow.