Currently I have a Genz-Benz Shuttle 9.0 paired with two Avatar SB112s. It is plenty loud and for smaller settings I just use one of the cabs.
Specs:
GB Shuttle 9.0 - 900W @ 4Ohm / 500W @ 8Ohm
Avatar SB112 Ceramic 500W @ 8Ohm
Avatar SB112 Ceramic 500W @ 8Ohm
Something modular like this would...