I have a pp-am20001, it is 1150w rms (or more?) at 1 ohm, seems to do it quite cleanly, but haven't had it running at more than 900 watt rms, so wouldn't really know. BUT there is no real reason to go all fusion, just get something better. If you must stay fusion though, get the nv-am25001, it's a pretty sick amp, and will last you well for upgrades later on.
Also, do those subs really have a 30mm xmax? Isn't that huge?