Welcome Sublab, and nice bass you picked up! Mine is a Rockbass model, and I find the pickups to be the hottest passive pups I've ever used.
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For amplification, I'm normally using my GK MB150E-112 if I want to be heard over a drummer. It's a 150 watt beast with the ability to power external speakers. I pair it with a 4x10 if I play with a loud drummer. I like the small size, and 26 pound weight. The sound is more "modern" and clear, with less of what some call "baked-in sound." Of course, you may prefer the sound of an Ampeg or Rumble.
Yes, I have two of them. Long story, I'll tell you about it if you want.
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They have not sold this model in several years, so good luck finding one used (part of my reason for 2). You may also consider the very similar MB150S-112, which just recently got discontinued.
Others have said that the newer MB series of combos are very nice, and I've heard good things about the MB 210.
Pricier than some others suggested, but maybe it's the sound you are looking for?