It simply has to be portable, meaning quite light. The line 6 micro spider seems good to me but the review doesn't seem that good. What do you recommend?
There's some sale going on at Yamaha and they're selling Orange amps at like $150-200. You might wanna check that one out. Just an alternative for you.
Oh and lunchbox amps are killer too. + 1 to Li Xiao'an's recommendation. My friend has one at home. It was very good for such a small amp. Too bad I'm the kind who loves cranking big amps :x . Still, I liked the lunchbox. doesn't sound as muddy as a Marshall MG15.