Here is a few things I would change to get more out of that build yet stay under $800.

PSU...you don't need 650w if you don't plan on running Crossfire.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817341022 $69.99
OCZ Fatal1ty OCZ550FTY 550W ATX12V / EPS12V SLI Ready CrossFire Ready Modular Active PFC Power Supply - Retail

LightScribe...Iv'e never actually met anyone that uses it.

http://www.newegg.com/Product/Product.aspx?Item=N82E16827136152 $22.99 Free Shipping*
LG Black 22X (CAV) DVD+R 8X DVD+RW 16X DVD+R DL 22X (CAV) DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache SATA 22X DVD±R DVD Burner - OEM

Now use that money you saved and get an after market heatsink so you can get more out of that build. You can give that cpu a mild bump to 3.6Ghz @ 1600 fsb (9 x 400).

http://www.newegg.com/Product/Product.aspx?Item=N82E16835233026 $26.99
XIGMATEK nepartak - s983 92mm HYPRO Bearing CPU Cooler - Retail

http://www.newegg.com/Product/Product.aspx?Item=N82E16835233019 $8.49
XIGMATEK ACK-I7751 Retention Bracket - Retail

http://www.newegg.com/Product/Product.aspx?Item=N82E16835186020 $6.99
ARCTIC COOLING MX-2 Thermal Compound - Retail
 


Nothing to it with the E8400...all you do is move up your FSB to 9x400 and you get a nice mild overclock that doesn't fry the chip, and your trucking right along at 3.6GHz @ 1600 FSB...and that memory will clock right along with it. :)
 


LOL....ya. That case is probably one of the best cases for airflow that you will find. It's set up to run 8x120mm case fans, has a side air duct, two side air vents, a ventilated front...that's set up for fans, and the top of the case is vented and set up for two fans. Take a look at the pics of that case, then click onto "Specs" and scroll down below where it gives the details. That case is a strictly gaming case if there ever was one.
 
Hmm for a budget build my suggestion:
$680.93
$7.59 shipping
$40 Mail In Rebate
$648.52 total expenses
Heka6xx.jpg


For those alien to OC let the auto OC TSeries software guide you along and with an unlocked multiplier its dead easy :p Also try your hand at unlocking the dormant 4th core perhaps hehe

Info
Combo's "said" to work".
CPU: 0904CPMW MoBo: Asrock AOD790GX/128MB --> Success
CPU: 0904EPMW MoBo: Biostar 790GX XE --> Success
CPU: 0904BPMW MoBo: Biostar TA790GX 128M --> Success
CPU: 0904CPMW MoBo: Gigabyte MA790GP-DS4H --> Success
CPU: 0904CPCW MoBo: Biostar TA790A GX2 --> Success
CPU: 0904EPMW MoBo: Asus M3A78-T --> Failure
CPU: 0904CPMW MoBo: Asus M3A78-T --> Failure
CPU: 0904CPCW MoBo: Jetway HA07 --> Failure