I am starting this thread to try to catalog lightweight, powerful amp heads, and their pros and cons. For instance- Yamaha BBT500H: Pros- light, 11 lbs, digital modeling of amps, 2-Ohm capable, price $399 at MF. Cons- Unknown quantity, nobody seems to know what they sound like, how powerful they are/aren't, do they have punch? Tone? Are they reliable? I would like to get a good sampling of what is available out there, and have this thread available for those looking for light, powerful amp solutions. Trying to stay under 20 lbs, but if something weighs 22 lbs, and is powerful, cool as well. Just trying to stay away from 88-lb. Ampeg heads and their ilk. Your suggestions?