Well, today I traded in my swr 350 amp along with some other odds and ends and picked up a qsc rmx1450 poweramp and a sansamp bass driver. This combination sounds AWESOME on my ampeg 4x10 and i've got headroom galore (the cab is 4 ohms. Even running just 1 channel on it gives me 450 clean watts and that's definately loud enough for a lot of my applications. I'm almost afraid to bridge it, it'd then push 1400 watts into my 4x10!? heh.. Long live poweramps!
I'm ready for stadiums now! hah.. I see that carvin has a 5000 watt poweramp or something (4 channels).. You could push 4 8x10's with 1000 watts each.. that's insane!