One of my area retailers sells coustic. I really don' t know much about them, but at this shop they're competing with JL & PPI so I'm assming they must be pretty solid.
Lanzar builds everything from entry level Vibe and Viberant, mid-level vibe pro and some of the best amps you can get (imo), Optidrive. In my experience, and from what I've read on-line, Lanzar amps are great for the price, whether you pay $100 or $500.