I've been playing in an indie rock band for the better part of a year and we've recently started doing small gigs, notably without any house pa system. The only amp I have is a Peavey MAX 100 which worked for practice but is just being drowned out by drums/vox/guitar. I can't turn it up without it sounding like a fart and I need a bigger-sounding amp. Ideally, I need something pretty portable as I move around with my amp a lot, but mainly I need to have a nice enough speaker where I can crank it up without it breaking up and distorting. Suggestions?