I just bought a tc electronic BG250 and I like it a lot. Lightweight but loud with some very nice features. Another possibility would be a GK MB115. Well built amps with great reps.
They should both be in your price range and you really couldn't go wrong with either one.
CV Jazz Bass, Matt Freeman PBass, GK MB112 Combo, TC BG250 Combo, Peavey 115 BW Combo