if you want to try out a cheap alternative:
the Behringer A500 is less than 200 bucks over there
it's stable to 4 ohms, 130w x 2 at 8 ohms and 180w at 4 ohms
it can be bridged to 360wpc for an 8 ohm load
if you want unlimited power:
Behringer EP2500
1000's of watts, for less than 400 bucks
downside is, you need to do a fan mod