First, you're posting in the wrong section, this should be in "homebuilt".
Second, are you aware that Intel is cutting the price of the Q6600 in HALF next month?
Third, yes that is a killer rig. I haven't heard of any resolution problems with that card. Could you be more specific? Link to articles you've read about?
What PSU are you using? That's a beefy setup, it needs some JUICE! Which OS are you using? 64bit I hope?
You shouldn't have any problem playing any games at any setting really. That's about as powerful as you can get. I would have looked into another 8800GTX over the quad core CPU, but that's not really necessary right now, you can always add another one down the line.