The Integrated Bass System line of amps contains the... 3510 (100W) bass head 3520 (200W) bass head 3530 (300W) bass head 3540 (400W) bass head 3560 (600W) bass head Now aside from the obvious power differences, I've seen photos of all these models of IBS amps and I've noticed that some have more features then others. I've heard the 3530 and I love it, I want to get one but they're hard to find. I've seen the other models floating around so if they produce the same sound Im definitely going to get one. So my question is do all the other models sound like the 3530? Or is every single one unique? And if they are all the same, at what level does each amp break up? I want to get a mid ranged overdriven distortion sound, and to do that I need to get the amp loud enough that its no longer clean and breaks up. I want the amp to break up in a normal band situation, so 120db break up point is not ideal. Any help at all is very appreciated. Thanks.