HHMMM....
Cadence Z9000-800 watts @ 4 ohms $200 off of ebay
RF 800.2 400x2 - $300 or so off ebay
JBL 600.1 600x1@2 or 1 ohm - $185 off ikesound.com
Autotek SS-550.2 550@ 4ohm bridged $205 off ikesound.com
Crossfire bmf 1000d (i think) 750@ 2 ohms(?) 225-250 used of some forums
Thats just...