I don't think you could go wrong with anything from Acoustic Image. The Contra I bought is the best
acoustic sound I've ever heard, and I've probably tried
nearly all of them, including my teachers Walter Woods.
However, volume isn't very loud, so you'll have to consider that if you play with a loud group, although with a
second cabinet, it seems to be loud enough for most situations. Their website is
http://www.acousticimg.com and they are good people. You ought to try one out because it is very different from anything else. The downward firing speaker makes the sound spread around, which takes getting used to after hearing speakers that aim write at you. My band loves it; they say they can hear me clearer and better than ever before.
Monte