Need Advice on Cheap Gaming Build

hi budget is around 600$

currently looking at:

Antec Three Hundred Black Steel ATX Mid Tower Computer Case - Retail
http://www.newegg.com/Product/Prod [...] 6811129042
$69.95

GIGABYTE GA-MA78GM-S2H AM2+/AM2 AMD 780G HDMI Micro ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Prod [...] 6813128090
$84.99

SAPPHIRE 100245L Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
http://www.newegg.com/Product/Prod [...] 6814102770
$169.99

APEVIA ATX-AS520W-BK 520W ATX Power Supply - Retail
http://www.newegg.com/Product/Prod [...] 6817148008
$59.99

AMD Phenom 9600 Agena 2.3GHz Socket AM2+ 95W Quad-Core Processor Model HD960ZWCGDBOX - Retail
http://www.newegg.com/Product/Prod [...] 6819103244
$129.99

G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-2GBNQ - Retail
http://www.newegg.com/Product/Prod [...] 6820231098
$49.99

Seagate Barracuda 7200.11 ST3500320AS 500GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
http://www.newegg.com/Product/Prod [...] 6822148288
$69.99

subtotal of $589.89

any recommendations?
any advices?
any changes?
plz let me know what improvements i can make on all these
btw i chose amd cpu because it's cheaper and it's quad core
dont know if it's the right choice

Personally, I would choose the http://www.newegg.com/Product/Prod [...] 6813128347 motherboard, and a http://www.newegg.com/Product/Prod [...] 6819115132 CPU.

It's more of a personal choice for me, as I've seen a few reviews of those CPU's getting very near 4ghz with some decent air cooling on them. For gaming I believe that would leave the AMD in the dust if you were able to OC that to 3.2ghz+ which you should be able to hit even with a half-way decent CPU heatsink. Plus with that board you could nab a decent Intel quad core maybe 6 months down the road when Core i7 has somewhat matured and the older 45nm quads do a decent price drop.

http://www.newegg.com/Product/Prod [...] 6811119142

COOLER MASTER RC-690-KKA1-GP Black SECC/ ABS ATX Mid Tower Computer Case Real Power Pro 550W Power Supply - Retail-$99.99

Go for this case (coolermaster) comes with a very gud power supply...and is jus abt 100bucks lots of gud reviews

And go for western digital 640GB hdd lots of gud reviews and very fast.....

check these deals on the case and power combo

http://www.newegg.com/Product/Prod [...] =10&page=1

It's a gaming rig. Go with the Intel E8400 in the combo deal for the Asus P5Q Pro. Total price after the rebate is $235 .....only $20 more than your original choices.

http://www.newegg.com/Product/Prod [...] 6819115037
http://www.newegg.com/Product/Prod [...] 6813131299

You'd get a CPU that is stock clocked at 3.0 and a quality motherboard that has 8x/8x crossfire potential for the future. I'm not even talking about overclocking, at stock clocks the Intel E8400 would blow the 9600 out of the water. If you overclock........
The Coolermaster CM690 is a great case, the power supply is adequate, and it would power that eventual crossfire.
Go with the Asus TOP 4850, it's factory overclocked and cheaper at $140 after rebate
http://www.newegg.com/Product/Prod [...] 6814121272

That apevia PSU is junk....don't both with it.

Consider this Antec 650watt with Active PFC $69 instead:

http://www.newegg.com/Product/Prod [...] 6817371015

It will give you the power to upgrade your Videocard in the future. Its $20 more expensive then the coolmaster, but you wont have to deal with rebates that make doing rma's difficult (just in case you get a bad one).

The Antec 300 case is well designed and possibly the coolest case in its price range, but needs 3 - 120 mm fans and 1 - 120 mm dust cover for the side vent to complete it.

Your Mobo is a solid choice. However, an Intel based build would give you lower power consumption, less heat (45 nm ) and a better upgrade path (775 socket is near its end but supports up to 3.2 ghz quad core CPU's). Consider this option instead:

E5200 $83.
http://www.newegg.com/Product/Prod [...] 6819116072

Most people are getting a stable 3.6 Ghz OC on this one with a decent cooler like a Xigmatek or Sunbeam and 3.0Ghz on the stock cooler.

Asus P5Q Pro $114
http://www.newegg.com/Product/Prod [...] 6813131299

This motherboard has an extra PCI-e 2.0 slot so you can upgrade to a second video card in the future.

If you insist on AMD :The AMD phenom is a good CPU for RTS games like supreme commander, but if you don't play RTS then a higher clocked dual core is a better choice.

http://www.newegg.com/Product/Prod [...] 6819103272

+1 for the 2 x 2 GB corsair DDR2
http://www.newegg.com/Product/Prod [...] 6820145184

For $5 more you can get a WD 640GB HD.