Gaming rig build, decent hardware?

[SleepingLesson]

Hey gang! I'm checking out hardware for my first build, and was wondering if I can maybe cut the price a little, or maybe get some better hardware without raising it much. Here's what I have:

- Pioneer Black 20X DVD+R 8X DVD+RW 12X DVD+R DL 20X DVD-R 6X DVD-RW 16X DVD-ROM... (http://www.newegg.com/Product/Product.aspx?Item=N82E16827129023)
- Western Digital Caviar SE16 WD3200AAKS 320GB 7200 RPM SATA 3.0Gb/s Hard Drive (http://www.newegg.com/Product/Product.aspx?Item=N82E16822136074)
- BIOSTAR TFORCE TA790GX 128M AM2+/AM2 AMD 790GX HDMI ATX AMD Mobo (http://www.newegg.com/Product/Product.aspx?Item=N82E16813138130R)
- HIS Hightech H485FN512P Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card (http://www.newegg.com/Product/Product.aspx?Item=N82E16814161259)
- CORSAIR CMPSU-550VX 550W ATX12V V2.2 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply (http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004)
- G.SKILL PI Black 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 900(PC2 7200) Dual Channel Kit Desktop Memory (http://www.newegg.com/Product/Product.aspx?Item=N82E16820231211)
- AMD Phenom 8450 Toliman 2.1GHz Socket AM2+ 95W Triple-Core Processor (http://www.newegg.com/Product/Product.aspx?Item=N82E16819103254)
- Antec Three Hundred Black Steel ATX Mid Tower Computer Case (http://www.newegg.com/Product/Product.aspx?Item=N82E16811129042)

$643 with tax and shipping

Also, will I be able to install an operating system I have on an external drive?

[123456]

$5 more, you get a 500GB hard drive. http://www.newegg.com/Product/Product.aspx?Item=N82E16822145215

600W PSU for $50. http://www.newegg.com/Product/Product.aspx?Item=N82E16817182062 I have a Rosewell PSU on one of my machines, works great.

I like it otherwise. What exactly is your budget?

[SleepingLesson]

Ah, both good suggestions.

My initial budget was $800, but I have since determined I shouldn't spend quite so much of my student aid money. ;) I want to keep around $600.

With your suggestions, I have lowered it to $611 with tax and shipping.

UPDATED
Different PSU and Processor. Am I paying too much for any of this? I plan to do some upgrading a year or so down the line, am I limiting myself too much? Might I want to splurge a little for a better mobo?

- Pioneer Black 20X DVD+R 8X DVD+RW 12X DVD+R DL 20X DVD-R 6X DVD-RW 16X DVD-ROM... (http://www.newegg.com/Product/Product.aspx?Item=N82E16827129023)
- Western Digital Caviar SE16 WD3200AAKS 320GB 7200 RPM SATA 3.0Gb/s Hard Drive (http://www.newegg.com/Product/Product.aspx?Item=N82E16822136074)
- BIOSTAR TFORCE TA790GX 128M AM2+/AM2 AMD 790GX HDMI ATX AMD Mobo (http://www.newegg.com/Product/Product.aspx?Item=N82E16813138130R)
- HIS Hightech H485FN512P Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card (http://www.newegg.com/Product/Product.aspx?Item=N82E16814161259)
- CORSAIR CMPSU-550VX 550W ATX12V V2.2 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply (http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004)
- G.SKILL PI Black 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 900(PC2 7200) Dual Channel Kit Desktop Memory (http://www.newegg.com/Product/Product.aspx?Item=N82E16820231211)
- AMD Athlon 64 X2 7750 Kuma 2.7GHz Socket AM2+ 95W Dual-Core black edition Processor (http://www.newegg.com/Product/Product.aspx?Item=N82E16819103300)
- Antec Three Hundred Black Steel ATX Mid Tower Computer Case (http://www.newegg.com/Product/Product.aspx?Item=N82E16811129042)

Total is $598 including tax and shipping.

[123456]

I'm a little unsure of the whole "open box" thing to be honest. Mobo: http://www.newegg.com/Product/Product.aspx?Item=N82E16813186147 $65.

[SleepingLesson]

Agreed. 15 day warranty on open box items. Great price, but that's not acceptable.

If I'm planning to upgrade this in a year or so, would I be doing myself a favor to get a $100+ mobo?

[123456]

Depends on the upgrades. If you want SLI/Crossfire or a better processor, it might be worth the investment. For myself, I built this system in October, but 2 weeks ago I upgraded the video card since I stupidly bought a $35 one in October which isn't a bad card, just not a gaming card. The one I have now is in my siggy. Anyways, I also plan to make this into a quad core in 2 years or so and boost the RAM to 4 or 8GB.