For my money the AC15C1 with a 2x12 extension gives me everything I need. I have no problems with volume - I'm using master volume on half and varying the channel volume depending on which guitar I play and how much crunch I want. No problems with keeping up with the others, even our 'Animal' drummer! I am one happy bunny. One thing I've found with bigger amps I've owned is that there's rarely an opportunity to 'open up' the master volume without the prior approval of a structural engineer. How many of us have had 50w or 100w amps before and only been able to play with the Master volume on 1 or 2? More than would care to admit. With the AC15 I can let it stretch it's legs so to speak. Small is beautiful!