That is basically my system (I got a 6800 though) and I can play half life 2 maxed settings, 4x aa, 8x af with a extremly smooth frame rate through out the game.
It is really worth building your own pc, you save loads, and get the parts that you want, you will also gain priceless experience of pc's, and look back and laugh at the thought of buying a pc ready built.
hm... when i choose the integrated video card(which probably cost like $10 dollars or something), it says 6600GT +$234. Ok, so i go to newegg to see the prices for it and here is the list for the AGP version of the 6600GT http://www.newegg.com/Product/Produ...ice=&MaxPrice=&SubCategory=48&Submit=Property
as you can see even the highest priced one isn't even $230, do you think they're ripping me off or is this the real price because the PCIe ones are around $230.