Proper being around 900w each. These subs will give you everything they have with a bit more power, but you're risking it if you try to go over 1200w I'd say. You could alwasy go for the iNuke with built in DSP. I believe the DSP on those allow you to control down to 20Hz. The iNuke3000DSP may be a good buy. Or if you prefer running the subs in stereo you could go for the iNuke6000DSP. These amps will get you where you need to be.
If ever you want to do a bit of tweaking below 20Hz (as the iNukes only control down to 20Hz) then you could always go with the miniDSP.
1000-1200w is about right...
for the extra hundred bucks, i'd get the 6000dsp.
as far as not being able to eq under 20hz, i wrote a guide on how to
do that to the dcx2496.
the same strategy can be used on inuke dsp.