Check out the Blaupunkt "Class T" amps. They're the smallest, cool-running, higher outputs amps that I found. I've been thinking of the 4ch model (100x4) or mounting an XM tuner module in the factory amp location.
1999 Ford Contour SVT #900/2760 (SOLD)
2005 Mazda 6s
2003.5 Mazdaspeed Protege
1998 Ford Ranger 4x4
