Ok. I think most people would still rather have the one big block sitting around as it's much simpler. Far fewer power cables. You can only stack like 3 M200's at a time, IIRC. They'd actually take up more space. Unless there's a nice deal (like now) I see most people getting one of the bigger amps. I went with the pair of smaller ones as that's all I needed, two channels of amplification. Sound quality wise, I wouldn't expect to hear any noticeable difference between the Outlaw amps. Sure, the 7100 wouldn't be able to go quite as loud, but that's about it.