Would the 620HX Corsair be enough for this rig?

4x1 gb corsair
74gb raptor
500gb seagate
intel core 2 quad 6600 - will overclock
ultra 120 extreme cooler
cm 690 case
scythe 120mm fan
vista 64bit
2 x 8800 gt ko factory clocked
680i A1 motherboard
samsung 24" synchmaster 245BW

yeah

Thanks. Anyone else?

It will run that just fine. With some room for expansion too. You really do not have to worry about the monitor considering the power supply. Since it does have its own power source.

You consider the case in the physical size of PSU it can handle. Since the Corsrair is not odd in how long it is. It should fit just fine. The only other concern I would have with a case and power supply would be if the cabling would be long enough. Again, I think the unit you are thinking of is just fine.