hehe got the same mobo, cpu and graphics card as you .. so i probably knows exactly how you feel trying to play these new games.
I would go with what Deadpixel said. I too am upgrading but early next year. If you want to get it now and cant wait then yeh get the Q6600.. but personally you waited this long whats a month or so.. wait till the penryns are released in jan.. and get yourself a QX9450 (im after this one)... if you want sli then i suggest wait again for 780i or a 680i if you cant wait. And finally for graphics 8800GTS rev2 or 8800GT for now.
dunno about that mobo so wont comment. does it support 45nm penryns??
cant go wrong with that HDD.
Personally i would get the Crucial Ballistix ram.
X-Fi ... sweet.
Nice "looking" cooler.. as other said there are much better performing ones.