Here is my Desktop's current Build, with Newegg Item numbers if you want to look them up, it's the numbers on the left:
11-147-010 CASE ROSEWILL|R103A BK RT
13-130-679 MB MSI|970A-G43 AMD970 950 AM3+ R
14-102-994 VGA SAPPHIRE|100323-2L HD6570 1G R
19-103-871 CPU AMD|ATH II X4 640 3.0G AM3 R
20-233-385 MEM 8G|CORSAIR CMX8GX3M1A1600C11 R
22-236-339 HDD 1T|WD WD10EZEX SATA6G %
27-136-259 DVD BURN LG | GH24NS95 %
All just under $300, due to a Shell-Shocker sale.
Here's where I want to go.
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148840
http://www.newegg.com/Product/Product.aspx?Item=N82E16819113286
http://www.newegg.com/Product/Product.aspx?Item=N82E16820148543
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125447
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128519
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119197
Long way away, but maybe I'll get there, and it's still under the $1000 tier, hell, even possibly less than $500, if you time it right.
Now, all of this junk, get's me nearly 60 FPS on almost all Source Games, CS:GO notwithstanding, and about...eh, 40-50 on Crysis. How long they'll last? Oh, way more than two years. Now, since NewEgg doesn't have the pre-built option yet, where they can build the PC for you, I recommended CyberPower due to having that ability. Here's a pretty basic PC, with all the flair taken off, from CP. (Since the Copy Pasta would dwarf the post, I made a PDF at the end.) Bear in mind that this build, has no OS, no Keyboard/Mouse, and only the interiors have been upgraded just a bit, to ensure long lasting stuffs. It runs near the $759 range, which I remember you stating you had a budget of $1000 - $800, this should fit the bill, if not, I can make a different build. Be aware that a LOT of these parts might have rebates attached to them...more bang for the buck.