120 watt? You don't need that kind of volume - afterall, if you needed that kind of volume, you'd be playing in arenas and most likely know what you're doing. I'm assuming you are neither, because you are asking on a forum for help with this.

However, I am a kind soul in this regard.
Line 6 make some lovely amps for that price range - http://www.music123.com/Line-6-Spide...-i751441.music

Oh look, it's even 120W. I have a spider II in my bedroom which I'll use for non-band practice and events which don't need the volume of 4x12" cabinet rig. For the price, you can't go wrong.

Really, though. Go for the sound/range of tones of the amp, not the wattage. It always amazes me how people dictate the quality of an amp by looking for a single 'number' or single characteristic instead of looking at the whole package.