I'll be the first to admit that getting a practice combo isn't the best use of your money when you're a bassist looking for gigs and you don't already have an amp that can hang. But as Grey said, not everyone is looking for that.
Genz Benz has a simple, functional solution with the 3.0 (and 6.0 and 6.2 combos although they're a little big and powerful to really be considered a practice amp.)
I'm seriously regretting selling my 3.0-10T to the point of getting another one. It exemplifies the beauty of a good practice amp: great sounding, the piggyback bracket makes it very portable, it's loud enough to use on quieter gigs and the head is removable and loud enough into a 4ohm 15", 2x12" 4x10" etc to work in a medium volume situation. I knew when I sold it I'd be regretting that decision.
I have a great sounding practice setup now but it's cobbled together from bits and pieces and a pain to move and set up. Genz really hit on something with the 3.0 combos that no one else has nailed quite as hard.
