Basically, I'm looking for a 5-piece setup to start with, kick/snare/3 toms, later to expand the toms to maybe 5 toms total. I want the nicest VDrum pads available, I know the high-end kits have the closest feel and mesh is too loose for most guys, they complain about that first more than anything. So, the high-end pads I'm sure have dual-zone at minimum for snare where there can be rimshot triggered as well. Does the TD-8 or maybe even a cheaper one, have enough connections for that?
The main reason I would get a TD-20 is so the drummer can hear sounds from that while tracking. Unless the lower models have good enough sounds going on, or if the 20 has MORE sounds, I'd want that. Record MIDI output of the module and that would be routed through Addictive Drums or whatever I may be using later on in conjunction with the mic'ed cymbals. If the lower priced TD modules can do all that for me with just as good triggering and handling cross-talk, etc. then let me know. I'm not super knowledgeable on the modules per se, just the pads. I've had a lot of experience with the different levels of quality pads out there and the top-of-the-line VDrum pads are as good as it gets.