Whoops I guess I erased anyone's doubts that I'm a noob. Sorry about the mistype, thank you for correcting that corrupted12.

gp19, KurganUK23 and with_teeth26, thanks so much for the recommendations! I really appreciate it. Here's more or less what I'm thinking of:

CPU: Intel Core 2 Duo E8400 @ 3.00 GHz

Mobo: ASUS P5QL PRO

Memory: Crucial 2GB Dual Channel Kit Desktop memory model

VGA: Diamond Radeon HD4850, XFX GeForce 9800GT, or XFX GeForce 9800GTX+

HDD: Western Digital Caviar SE16 500 GB 16MB cache

Power: CORSAIR CMPSV-750TX 750W ATX 12V / EPS 12V

Case: Ultra X-Blaster ATX mid-tower

Cooling: XIGMATEK HDT-S1283 120mm Rifle CPU Cooler & Arctic Silver 5 Thermal Compound OEM

Unless I've forgotten (or misunderstood) anything I should be able to get it for under US$700. Other than the ubiquitous "does that look decent?" question I'm also wondering how the power supply, etc. will function in Japan (where I live), because they have 100V instead of 120V like in the US (I think).

Finding out on Christmas that my good old Sony Vaio PC can't run Fallout 3 was the last straw, I need a gaming PC. I have a monitor, keyboard and mouse so all I need is the computer itself.

I have looked at some models, but this would be my first gaming PC and I really don't know too much about them. Here's more or less what I'm looking for:

Processor, at least 2.4GHz

Memory, at least 2GB

OS, preferably Windows Vista Home/Premium

Video card, preferably 8800GT or better

Hard drive, at least 200GB

Price - under $900US

I've found a few models that look promising to my noob eyes. Unfortunately I'm not seeing a whole lot of tower-only bundles, and I don't want to pay more than I need to on my starter salary. Anyway here's what I found:

iBuypower Gamer 515-GZ2 AMD Gaming Computer ($739.99)

WidowPC WGMI-2NG770 Gaming PC ($899.99, w/ keyboard & mouse)

WidowPC Intel Gaming Desktop Computer ($799.99, w/ keyboard & mouse)

iBuypower Gamer 528GN Gaming PC ($799.99, w/ keyboard & mouse)

Since I know next to nothing about what makes a good gaming PC, I was hoping that I might get some advice, recommendations, etc. Thanks!