I just bought this today:
I was going to look for a little practice amp that would allow me to play in my apartment without being evicted, as I likely would with my current rig:
...but I saw this little number for about what a practice amp would cost, plus it can plug in if desired, this way I can be quiet AND portable AND have a second bass to play for certain types of music. I paid $200 for it and it played better than some other acoustic basses did for $400 and almost as good as some for $600.
I still haven't done the second cabinet thing...