Have you checked out what Alpine has to offer. I have had there stuff in my cars for years now and I have never burned up an amp, I have blown some subs though. The amp in my mind for your app. would be the MRP-M1000. It is a class D mono block amp.
Specs:
RMS Power (at 14.4V, 20-200Hz)
Per channel into 4 ohms: 600W x 1 (1% THD)
Per channel into 2 ohms: 1000W x 1

__________________
2005 F150 California Limited Super Cab

K&N FIPK C.A.I. Flowmaster side exit exhaust
Alpine CDA-9886 Deck w/iPod controler
Qlogic box with 10" Alpine R series sub
Alpine V-Power 500w mono D amp
My picture albums
Flowmaster video
"Why a Ford you ask... Because there's nothing better."