Please help me with my new build :-)

Alright, I just ran into about $700 dollars and I'm looking to upgrade my PC.

To start off, I already have a monitor, OS, case, and 350W PSU. My overall goal is to have a perfectly compatible PC and have 0 build problems. I'm looking to basically build the best high-end computer for the dollar. If you can suggest better parts for the money please suggest it though I can't go much higher on the total. I hear that G.Skill memory is great for overclocking and I'm looking to run 1:1 if possible.

MEMORY
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model F2-8500CL5D-4GBPK
$104.99

MOTHERBOARD
ASUS M3A32-MVP Deluxe/WiFi AM2+/AM2 AMD 790FX ATX AMD Motherboard (OPEN BOX)
$140.80

DVD DRIVE
SAMSUNG 22X DVD±R DVD Burner with LightScribe Black SATA Model SH-S223Q/BEBN
$25.99

CPU & HD
Western Digital Caviar SE16 WD5000AAKS 500GB 7200 RPM SATA 3.0Gb/s Hard Drive
AMD Phenom 9950 BLACK EDITION 2.6GHz Socket AM2+ 140W Quad-Core Processor Model HD995ZFAGHBOX
$214.98 For HD and CPU

GPU
ASUS graphic card bundleASUS EAH4850/HTDI/512M Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card
$182.99

Grand Total: $669.75

avoid open box, and theres no way a 350 watt power supply can power that system. the 4850 requires at least 450. forget the 790FX board, get a 790GX instead. also, im not sure why you're calling this a high end system. one, it's $700, thats considered budget, and two, you're getting a phenom.

the 790GX is newer and quite a bit better. it allows higher overclocking and other benefits. tom's did an article on it not too long ago. And as for the phenom thing, i've got nothing against amd (i have an athlon x2 system atm) but the phenom just isn't as fast as the core 2. if you want the absolute best, consider maybe a P43 board and a Q6600.

The 790GX has a better southbridge, the SB750, and that is what allows for the better overclocking ability. The north bridge of the 790GX only allows you to have 2 8xPCI-E slots while the 790FX allows for 2 16xPCI-E slots or 4 8xPCI-E slots. Since you only have $700 total and if you don't plan on using crossfire then you may want to go with a board based on the AMD 770 that can support 140W CPUs. You could also go with something like what I have, the Gigabyte GA-MA790X-DS4 for 124.99 which can support the Phenon 9950 (after a BIOS update).

I say go with a 9850 Black edition, which is strangely for only 174 right now on new egg, and save a little money. You could also go with the 8750 for only 139. You need to save some money somewhere so that you can get a decent power supply. An Antec True Power Trio TP3-550 550W will set you back 49.99 from New Egg and has free shipping.

The rest of the components seem fine. A Radeon 4850 is the way to go right now though you shouldn't discount the Nvidia 9800 (basically the 8800) series of video cards since you can get a 9800GT for only 129.99. Of course the money to go up to the Radeon 4850 is more than worth it. You should also consider going with 4GB of DDR2 800 since the performance gain over 1066 memory isn't as good as using that money for a better processor or GPU.