No, I don't think I plan overclocking with the Corsair CX 600. It will have enough just running my system.
I did some adjustments to my planned rig:
CPU Cooler: Maybe none, using the stock cooler
GPU: MSI R6950 Twin Frozr III Power Edition/OC
HDD: SAMSUNG SpinPoint EcoGreen F2 1500GB
EDIT: what does it mean, API: Microsoft DirectX 10 on the i5 2500k processor?