Please review my low budget build

Hello Tom's Hardware,

I'm a first time builder and looking to build a low budget gaming PC. Getting back into PC gaming as I mostly game on Xbox 360.

APPROXIMATE PURCHASE DATE: today or tomorrow

BUDGET RANGE: $350 - $450 (would push to $500 if necessary ) after rebates

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: light - mid range gaming (I have a Thinkpad for work, and a netbook too for browsing and other things. )

PARTS NOT REQUIRED: keyboard, mouse, monitor, speakers, OS, hard drive( Samsung Spinpoint F3 ), ODD (Sony Optiarc), GPU (MSI 9800gt 512mb)

PREFERRED WEBSITE(S) FOR PARTS: newegg, amazon

PARTS PREFERENCES: none really, but I am going for an AMD based build, since I'm going low budget

OVERCLOCKING: No

SLI OR CROSSFIRE: Crossfire perhaps in the future, not right now.

MONITOR RESOLUTION: 1440x900 resolution

ADDITIONAL COMMENTS:

I ordered a Samsung Spinpoint F3 500gb and a Sony Optaric DVD drive a week ago when I was thinking of upgrading a very old desktop (5 years+ old components ), but decided to scrap that and build a new machine. I play games like Sims 3, Guild Wars, and will play Guild Wars 2 when it comes out. Perhaps Fallout 3 and Crysis on low settings, again, I'm still kind of getting back into PC gaming.

Now to my questions:
1)For this case will I need any cable extensions for good cable management?
2)If I am not planning to overclock is the stock HSF okay to use?
3)The GPU I already have (MSI 9800gt) should work with this build, correct?



With shipping and after rebates = $311.29

NZXT GAMMA Classic Series ATX Mid Tower Interior Steel Chassis (Black):
$29.99- $25.00 gift card + free 2 day shipping through amazon prime = $4.99

Already purchased:
Samsung Spinpoint f3 500gb - $54.99
Sony Optaric - $19.99 at the time of purchase
= $74.98

Final cost: $391.26

Thanks!
Jocelyn