High Intel/RAM/SSD and Low GPU route:
CPU: Intel i5-2500K $220 can be overclocked later on down the road(K after the number means unlocked and can be overclocked)
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115072
*Possibly save $10 with Intel i5-2500, no overclock
Motherboard: MSI Z68A-G45 (B3) LGA 1155 Intel Z68 $130, $110 after rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130618
RAM: G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 $45
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231428
SSD: Crucial M4 64GB SATA III MLC $115
http://www.newegg.com/Product/Product.aspx?Item=N82E16820148441
PSU: OCZ ZS Series 750W 80PLUS Bronze $100, $75 after rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341049
GPU: XFX HD-677X-ZNFC Radeon HD 6770 $125, $95 after rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150560
DVD: SAMSUNG 22X DVD Burner $18
http://www.newegg.com/Product/Product.aspx?Item=N82E16827151243
Total: $703 after rebates + shipping
This route is the higher end CPU/SSD and lower GPU way.
Reasons for this route...easier to upgrade GPU compared to CPU and get great increase in performance from SSD(your boot drive/OS drive).
*An SSD is also very easy to install for an upgrade, but that also means you have to reload your OS and programs.
Other variations...
No SSD, get Western Digital Blue 500 GB for $90, save $25 but lower performance(big difference)
Less RAM, 4GB (2x2GB) for ~$25, save $20 but lower performance(least noticeable) and very easy to add more later.
Lower CPU, Intel i5-2300 $180, save $40 or Intel i5-2400 $190, save $30, and again lower performance(medium difference)
Make some of those changes and you may be able to get a GTX 460($140) or GTX 560($165) or Radeon HD 6870($150), which I think is probably a touch better for your purposes.
To get a higher GPu build, I would go with...
less RAM: G.SKILL Ripjaws X Series 4GB (2 x 2GB) 240-Pin DDR3
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231425
lower CPU: Intel CPU i5-2400
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115074
new GPU: Radeon HD 6870
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102948
new Total: $705, I think?