T/D (I'd love to have T/T and D/D, but don't have the room)
BMan (the module "I thought I wouldn't like but now can't live without . . . ")
VX
EG 3/4
. . . but I'd also need to have at least SL2 or (SLX?) on hand, and probably add COD and either EG5 or MHG. When they sound so great, eight channels of preamp just isn't enough!?!? For my current 'serious' gig, I actually use 7 or 8 channels of the M4 for almost every show (and the M4 is the only preamp I use for it, and all dist/OD/preamp/boost pedals have been removed from my rig and I don't miss them at all). I'm also running theremin and bass through the M4 from time to time.