what type of tones are you after? there's a lot of guff talked online (and elsewhere) about tube amps needing to be loud to sound good, and while there's some truth to that, the same is true for non-tube amps (to a certain extent). also it depends a lot of the type of music you're playing- you need power tube distortion a lot more for classic rock than you do for modern metal, for example, plus as Ian Price correctly said, there are ways round the volume thing with things like power scaling, VVR, etc. EDIT: and as he also correctly implied, even supposedly "low wattage" valve amps are loud in bedroom situations. Not buying a 50 watt amp which will do the exact tone you want in favour of a 15 watt amp which won't (and which will still be way too loud) is silly.