^ the link just dont work for me and u aint posting the specs either. anyways for 2nd GPU u certainly dont need higher then 700w PSU dats for sure with cards like 6870 or 470 and below. Samsung F3 is a better hdd. Asus board is most preferable. Full Tower case is preferable if budget allows.
If u post the specs listed in that link that would be very kind of u.
One thing I am worried about now: the motherboard. Which mb would you suggest that for now works fine with one GPU, has USB3 functionality THAT IS NT LOST when a second GPU is maybe added later and how would this mb affect my power requirements.
* 500GB Western Digital WD5000AVVS Caviar Green, SATA 3Gb/s, 8MB Cache
* NZXT Panzerbox, Black, Aluminum Mid Tower Case w/o PSU
GPU for future consideration of adding another GPU, u might not get the 5870 after an year or so cause its old now but u will have the 6870 available. Samsung F3 hdd is better in performance from W.D and Seagate.