Hey,
I'll throw my 2 x cents in also!
I have a case dedicated to drums i've been building and I love it. Glad I didn't hear the advice not to go down this route before spending so much on it.
In my scenario i've gone with the concept of building 2 x kits in the one case, using 1 x sequencer with enough trig outs to control many things (I use Erica which has x16), 2 x mixers, one for each kit, and a cross fader.
I'd agree with all of the above recomendations and add:
Consider getting a case with 1 or 2, 1U rows, very handy for additional functional modules.
I use a couple of 1U (Bear modules) connector modules for cable management as once I have the triggers from sequencer patched up I don;t really need to chage them so it avoids a big spagetti. So you're onto a good idea there, in my opinion!
I'm going to add some 1U switches also so I can distribute modulation to different drums.
As some "drum" modules can be used to make non drum sounds, a few times I've ended up just jamming my drum rack and having great fun.
