As a [i]practice[/i] amp, my MB112 (the old one) is pretty much perfect. It was just what I was looking for: lightweight, headphones out, line in for MP3s. I've had no problems with it, but then again it hasn't been out of the spare room, and I haven't tried the DI.
I figured it would be good for small gigs, like you have, but I have yet to take that step...