As it seems I'm going to build a i7 rig, and was thinking about which PSU to use..

It will power my system about 3 hdds and my water cooling with fans.. but the pump is about 10W and I guess the fans combined are about 10 aswell the i7 will be over clocked

I'm going to use a Ati 3870 in the beginning but probably gonna get me a Nvidia gtx285 or similar.. whenever I feel the need to get my gaming on again

I can choose between the HX520 and a little bit newer TX650?

or should I sell the HX520 and get another one? (kinda last option)

Any thoughts?

Tom