Your Antec 1200/TPQ-1000 is $295 with the current combo at newegg. Good price, but they are overkill. Get these parts instead and save $112.
http://www.newegg.com/Product/Product.aspx?Item=N82E16811146047&Tpk=NZXT%20Tempest
NZXT TEMPEST Crafted Series CS-NT-TEM-B $90
http://www.newegg.com/Product/Product.aspx?Item=N82E16817703019&Tpk=Silencer%20750W
PC Power & Cooling Silencer 750W $93
The hard disk you picked is an excellent choice, WD6400AAKS at $75.
So, now your budget is $1000-$90-$93-$75, for CPU/GPU/MB/RAM/burner/Windows. Let's do the easy part first.
Vista Home Premium SP1 64-bit $100
http://www.newegg.com/Product/Product.aspx?Item=N82E16832116488
LG SATA burner, $24
http://www.newegg.com/Product/Product.aspx?Item=N82E16827136149
mushkin 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400), $43
http://www.newegg.com/Product/Product.aspx?Item=N82E16820146731
E8500, $190
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115036
Now comes the fun part. The budget is now $385 for GPU(s) + MB.
Try something like this:
ASUS EAH4870/HTDI/512M/A Radeon HD 4870 512MB, $220, includes World of Warcraft
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121276
Now you have two choices for motherboard:
1. $60 over budget, but excellent for Crossfire (i.e. for adding a second HD 4870 later)
GA-X48-DS4, $225 or P5E Deluxe X48 $220
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128336
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131317
2. within budget, perfect for one video card, but when/if you add a second one you'll get less fps than with an X48
GA-EP45-UD3P $117 or P5Q Pro $105
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128358&Tpk=GA-EP45-UD3P
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131299
There are SLI options too, but I'm staying away from those this year. Last year the 8800GTS G92 SLI was the best multi-GPU solution, but this year nVidia has some difficulties and ATI is in the lead. Anyway, if you prefer SLI, look at 9800GTX+ cards and something like eVGA 750i FTW for example.
Another thing: if you're absolutely sure you want more graphics power than a HD 4870 card can supply: if you buy an X48 MB and two HD 4870 512MB cards you end up paying something like $225+2*$220 i.e. $665. For that kind of money you're better off with the $105 P5Q Pro and a $530 HD 4870 X2 2GB. The X2 2GB alone beats the two HD 4870 512MB cards, especially at larger resolutions, thanks to the extra RAM.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814129114