I just picked up a Rivera thirty twelve for a crazy low price. It's an awesome amp, with a great feature set. Why was it so cheap? I paid around $600 which seems to be about the going rate for most of the lower powered Riveras. I don't see much talk about them here, anybody got any ideas why? I've seen several "what amp should I buy" threads that list a laundry list of requirements that Riveras fit perfectly, but nobody even thinks twice about them. Is it just a case of not being "cool" enough?