well I started with a basic Yamaha active 4 (RBX374), and now I've upgraded to a Spector Legend 5. First gig about 6 weeks and loved it. I still think the 2x12 is a good choice. When I tried them in the shop, I found that a 1x15 was too muddy, and a 2x10 had no bottom...
Spector Club #402, Legend 5 Classic, Fender MIM P Bass
Ampeg PF350, TC Electronics BC212 & BC210, Ampeg BA112