What PSU Should I buy?

Power supply should be o.k. johnnyguru.com looked at and reviewed the 1000watt version and gave it a score of 9.5/10: I haven't the time to find any other reviews. Nvidia recommends a minimum psu power of 600watts for the system and min. of 42amp. of current for the card: That psu has a combined 12V amps of 80 - more then enough power.
If you are NOT using a 27" or larger display, or spreading your games over 3 monitors, nor have any plans of getting such a display set up, then the 4GB video card might be over kill; you can save a little money by getting a 2 GB card. I have the 660 cards w/2GB and play on a 24" HD monitor and the most video memory any game has ever used is 1.4-1.6 GB on Ultra or Very high settings.
ONe last addition: a mechanical or regular harddrive for storeage, 1TB-2TB; that 120GB SSD will fill up pretty fast.
And add a 64bit operating systems. I don't particulary like Windows 8.0 nor8.1, I would get Windows 7 Professional.