depends on your taste. I'm a bass player used to very lows, smooth mids and crisp highs, so I chose SWR. If you're more into low mid thump, no highs Ampeg would be the way to go.
I agree with the positive thoughts about Ampeg (own one myself) But, you can check out Mesa Boogie and EBS too. I played a Mesa Boogie just recently, think it was called G400 or something and it outperformed my Ampeg completely....I want one now. It's expensive though....as good Ampegs are