Help me build a good gaming computer for world of warcraft

i like medevil total war and stuff so i wanna ahve a good desktop set up

if you want to buy it already made get this computer http://www.avadirect.com/product_details_configurator.asp?PRID=2541 and make these changes( add a crosair 450watt for powersupply, make the harddrive 160gb, add a x2 4600 for processor, add crucial 2x1gb 667mhz, add windows vista basic and lastly add a 8800gt for video card) the price for all of this should be $864

if you want to build then get

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128059

http://www.newegg.com/Product/Product.aspx?Item=N82E16820227089

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150264

http://www.newegg.com/Product/Product.aspx?Item=N82E16819116036 (overclocks to 3ghz easy)

http://www.newegg.com/Product/Product.aspx?Item=N82E16811129021&Tpk=antec%2b900

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139003

http://www.newegg.com/Product/Product.aspx?Item=N82E16827106228

http://www.newegg.com/Product/Product.aspx?Item=N82E16832116196

http://www.newegg.com/Product/Product.aspx?Item=N82E16822148262

total=$829

world of warcraft is pretty old dude, are you sure thats all you want your rig to shoot for?

you dont need much. hell, even macs can play it