Both the Nord Lead and the Virus are fairly similar as far as programmings concerned. They're both subtractive. The TI has better modulation perimeters, and you can modulate just about everything. Not sure about the other Virus', I've only used the TI. Now the Nord has no effects, not as deep perimeters for modulating. And in my opinion sounds flat and uninteresting. Now I don't own a Lead 3 but a 2X. I played around at the local music center, and diddled the Lead 3 and the 2X, and even the G2. I decided on the 2X. It sounds alot more lively and animated. The Lead 3, I didn't care for at all. And now Nord has discontinued the 3, so if you needed to get a new motherboard or something your s.o.l., and I hear it's not all that uncommon for the MB to crap out on you.
I'm very happy with the Rack 2X, if compliments the TI very well. Picked one up on eBay for $570 US. It's extremely easy to program, 4 part multi timberal, and kicks alot of ass. Hope I was of some help.
