I need an amp for my acoustic-electric bass.?

I need an amp for my acoustic-electric bass that is around 100 watts or more. I'm looking around the $300 price range. I tried several at guitar center. Almost all of them ahd a lot of feedback problems. The Fender Rumble and the Ampeg combo had the least. The Acoustic brand was the worst. Has anyone used the Kustom or Behringer combos for an acoustic bass before? Any luck?