All, or at least the ones that I have seen, are overrated. My 250x2 was rated at 362 watts and my 400x4 was rated at 589 watts. I love Fosgate amps the only problem with them is that sometimes they can overheat if you dont get one with enough power to push your subs.
HU: Kenwood CD w/ Kenwood Chg
FRONTS: Kenwood DB+ Excelon 2-way 6.5"
REAR: Kenwood 3-way
MID/HI AMP: 400x4 Fosgate Punch
SUB: 12' Kicker VR
SUB AMP: 250x2 Fosgate Punch
**Soon to come... anything but those front Kenwoods, possibly Infinity Perfect Seperates