I happen to like the Roland Micro-Cube- incredibly, I believe it's rated at 2 watts. This little amp came to my attention when I saw street bands in subways, and it cranks out some good volume for such a tiny thing. It has a handle, runs on AC or battery power, has 5 different modeling effects- clean, flange, chorus, reverb, distortion, and something else I can't remember. It has a tuner- just the tone of 440 A, and you can also tune a 1/2 step down with the tuner if you want. Weighs maybe 10 lbs. I really like it. Look up reviews at harmonycentral, or samedaymusic. Cost is usually in the $100 range, unless you find a sale.

Have a happy.