I'm personally more into/knowledgeable of high-end builds. This is some of the best you will get for $800. You cannot really cheap out any more on the case. Although, you can get a lower Watt PSU to get a slightly better GPU I would imagine.
Good luck with your PC!
It seemed to block out the link.
CPU Intel Core i5-2550K 3.4GHz Quad-Core $270.98
CPU Cooler Noctua NH-C14 $73.00
Motherboard Asus P8B75-V ATX LGA1155 $84.99
Memory Corsair Vengeance Pro 8GB (2 x 4GB) DDR3-1866 $72.99
Storage Seagate Constellation ES 1TB 3.5" 7200RPM $101.98
Video Card PowerColor Radeon HD 7770 GHz Edition 1GB $89.99
Case NZXT Tempest 210 ATX Mid Tower $47.06
Power Supply Corsair 750W ATX12V / EPS12V $94.78
There you are!