Many of the parts you posted are low quality or somewhat outdated.
This system is considerably faster, and will run all current games and is somewhat excessive for WoW imo. You could upgrade the video to an 4870, but that was pushing your budget a little. The onboard sound on this motherboard will be very comparable to the soundcard you posted, upgrading the sound would not be worth it unless you were getting an xtreme gamer card.
http://www.newegg.com/Product/Produc...82E16813131299 --P5Q Pro=$135-15 rebate get the combo with the e8500
http://www.newegg.com/Product/Produc...82E16819115036 --e8500 =$190 get the combo with the motherboard
http://www.newegg.com/Product/Produc...82E16817139006 --corsair 750=$120-20 rebate
http://www.newegg.com/Product/Produc...82E16820148212 --4gbmemory=$96-40 rebate
http://www.newegg.com/Product/Produc...82E16814161235 --4850 =$165-30 rebate
http://www.newegg.com/Product/Produc...82E16827136153 --dvd drive = $27
http://www.newegg.com/Product/Produc...82E16822136073 --500gb HD=$70
http://www.newegg.com/Product/Produc...82E16811119137 --case = $75
http://www.newegg.com/Product/Produc...82E16832116488 --Vista 64=$100
http://www.newegg.com/Product/Produc...82E16824254035 -- monitor=$170
http://www.tigerdirect.com/applicati...0&sku=L23-7288 -- mouse/keyboard =$80
http://www.newegg.com/Product/Produc...82E16836121014 -- speakers=20$
Total: $1248
Rebates:-140Also includes combo savings
Final: $1108 not including shipping and possible tax.