yeah you could use a 1000 wat psu on your system its the max power, for example say you had 4 graphics cards in sli and a 500 watt psu, if you do somthing really graphic intensive like a videogame or somthing your computer will shut down because its asking to much from your psu it cant give that much
but if you got a 1000 wat psu and your using like 200 wats of it then your putting zero strain on it and it will stay cooler, its not like if you put 400 wats into 300 wat subs
i would get a good 500W PSU (Corsair)
It will be very good, quiet, efficient, and can be used if you get a better GFX card
Here is a great 500watt PSU for $39.99 with promo code
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Dont just go by what some power calculator said. What setup is this going on?
Thats a good deal that bigfella posted, i would go w/ consair over anyother psu company.
On the cpu and video card.
I would go for the 9500GT, better than an 8600GT, requires less power, decent card, only 5 more, i am not sure how the pounds thing works, but its 45 pounds? so only 5 more pounds...
http://www.lambda-tek.com/componentshop/index.pl?prodID=B139858
And the cpu, Go for the 7750 BE, it is faster, and it provides better overclocking, more cache...
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103300