http://www.ebuyer.com/search/?qfind=...eries+&x=0&y=0

The top 520w one is good but if you can afford it id get the 620w, especially if your upgrading to a 8800.

700w isnt needed unless you have like 2 8800's, quad core processor with 10 fans running etc.

Also with PSU's its better to get a 520w decent brand than a 1000w shitty no name brand that nobody has ever heard of