drop that 8800gt back to a 3850 (512mb if you game @ high res), get a antec sonata III case it comes with a nice 500watt psu, you might want to order an extra fan with that case because I think it only comes with one 120mm fan... that should drop your pirce a bit.
this is referring to Paulies post.
Edit: do you have a dvd player/burner? drop lock you forgot to add ram to your list
also you could skip out on an aftermarket heatsink and get that later on down the road locally.
No I dont have a DVD Burner, but i do have a DVD player. Ohh ya I did forget about the memory.