$800-$850 gaming build - please provide feedback!

Please help me! I know enough to be dangerous, but I know that I have a lot to learn still.

I would prefer to spend $800 or less. If forced, like this example, I could do $850 at the outside highest. I have tried to min/max this to be able to run games well... I have lots of questions!

1) Will these components work together? Am I forgeting something? I have a HD tv (need hdmi interface), I have a mouse and a keyboard.
2) Can you improve performance/find bottle necks in the performance?
3) Can you get the price down without losing too much performance compared to where it is at right now?

I really appreciate the help!!!

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All of this came from egghead - today 11/2/10
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1MSI H55M-ED55 Micro ATX Intel Motherboard
Item #:N82E16813130264
Return Policy: Standard Return Policy$99.99

1Western Digital Caviar Black 750GB 3.5" SATA 3.0Gb/s Hard Drive -Bare Drive
Item #:N82E16822136283
Return Policy: Standard Return Policy$69.99

1Intel Core i5-750 2.66GHz LGA 1156 95W Quad-Core Processor
Item #:N82E16819115215
Return Policy: CPU Replacement Only Return Policy$199.99

1LITE-ON 24X DVD Writer Black SATA Model iHAS424-98 LightScribe Support
Item #:N82E16827106335
Return Policy: Standard Return Policy$25.99

1Microsoft Windows 7 Home Premium 64-bit 1-Pack for System Builders
Item #:N82E16832116754
Return Policy: Software Standard Return Policy$99.99

1Rosewill CHALLENGER Black Gaming Computer Case
Item #:N82E16811147153
Return Policy: Standard Return Policy-$5.00 Instant
$59.99/$54.99

1Zonet ZEW2546 USB 2.0 Wireless Adapter
Item #:N82E16833130066
Return Policy: Standard Return Policy-$8.00 Instant
$24.99/$16.99

1G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Dual Channel Kit Desktop Memory
Item #:N82E16820231189
Return Policy: Memory Standard Return Policy$74.99
1GIGABYTE Radeon HD 5770 GV-R577SO-1GD Video Card
Item #:N82E16814125327
Return Policy: VGA Standard Return Policy$20.00 Mail-in Rebate Card
$149.99

1COOLMAX NW-650B 650W ATX12V v2.2 SLI Ready / CrossFire Ready and Compatible with Core i3/i5/i7 Power Supply
Item #:N82E16817159082
Return Policy: Standard Return Policy-$10.00 Instant
$69.99/$59.99

Grand Total:$852.90