I am currently using a fender super reverb (circa 1970) for a keyboard amp. I'm pleased with the sound that I get from it, but the weight/size makes it less desirable for gigging. Does anyone have any suggestions for mid to small size amps (preferably tube)that still retain a full sound? The amp will primarily be mic'd. I have been looking at some fender princeton tube amps, but I'm afraid they won't give me enough low end.