Building first gaming PC

I am considering buying this build from Newegg.com and was wondering if anyone could give me advice such as: Is it worth the price, ability to upgrade, how should this handle the newest games such as, but not inclusive to, Rage, Starcraft 2 (with possible upcoming expansions), Battlefield 3, Elder Scrolls V: Skyrim... the full link to this is here http://www.newegg.com/Product/Comb [...] mbo.667441 .
NOTE: THIS WOULD BE MY FIRST TIME BUILDING A PC FROM SCRATCH. (however, having been a tinkerer for quite some time, I feel confident going into such a project)
ALSO NOTE: I am building on a budget.  



1x COOLER MASTER Storm Scout SGC-2000-KKN1-GP Black Steel / Plastic ATX Mid Tower Computer Case (Model:SGC-2000-KKN1-GP)

$89.99
1x Asus P6X58D-E LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 ATX Intel Motherboard (Model 6X58D-E)

$219.99
2x MSI N550GTX-Ti Cyclone OC GeForce GTX 550 Ti (Fermi) 1GB 192-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card (Model:N550GTX-Ti Cyclone O)

$299.98
1x COOLER MASTER GX Series RS650-ACAAE3-US 650W ATX12V v2.31 80 PLUS Certified Active PFC Power Supply (Model:RS650-ACAAE3-US)

$79.99
1x Intel Core i7-960 Bloomfield 3.2GHz LGA 1366 130W Quad-Core Desktop Processor BX80601960 (Model:BX80601960)

$279.99
1x G.SKILL PI 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL6T-6GBPI (Model:F3-12800CL6T-6GBPI)

$124.99
1x Seagate Barracuda Green ST1500DL003 1.5TB 5900 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive (Model:ST1500DL003)

$64.99
1x LITE-ON CD/DVD Burner - Bulk Black SATA Model iHAS124-04 (Model:iHAS124-04)

$18.99

Combined Total: $1,178.91
Combo Discounts: -$64.92
Combo Price: $1,113.99


*** I have moved this from my previous thread which was in PC Gaming.

***I want to get the best bang for my buck in PC gaming. *as does everyone

*** If anyone has a comparable build between $750 and $1,000 I would love to hear it.

***if I went too crazy with Asterisks, I apologize.