dump the b-company vca - and get a decent quad cascading vca from a reputable company - veils if you can find one, an intellijel or a happy Nerding 3*vca - you will need more vcas so it's a better investment (especially the veils!!)
as @benscott suggested get a bigger case - you will need it much sooner than you hope/expect/think - tiptop mantis is by far the best combination of hp/cost/decent power/manufacturer reputation - the power in the mantis is way way better than the uZeus!!! plus you will avoid the waste of space that is a rack wart (power supply module)
I wouldn't put a compressor in a build this size - and probably wouldn't go with a dual adsr - doesn't the gm have cv and envelope out - I might add a voltage controlled envelope generator of some sort though
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities