I have the Ultra myself, 8800GTX, Q6600 @ 3.82, 9 120mm fans, Crystalfontz LCD & Fan control, 2 HD (750GB WD, 250GB Maxtor), GA-P35C-DS3R, Watercooled (so pump), 2 DVD+RW
Definitely no power problems what-so-ever with this beast.
Myself I wanted the Modular so that is what decided me on this...