First Self Build in 12 yrs...900 max budget...suggestions?

OK so I am very new to the Toms forums and I know this is the perfect place to get some sound advice when building a new gaming rig. I am wanting to build a gaming PC that is also fast net wise and could do video/music editing if the mood strikes.
The main thing I want to know is what is the BEST build for my money( ~900 USD including shipping) for intensive gaming? Any of the US retailers for prices is fine(new egg, tiger direct etc.). I have included my attempt at what I thought would be pretty fast(and yes I am planning to OC otherwise no point in the AMD Cpu)

CD/DVD Burner
ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner - Bulk - OEM
$16.99


HDD
Seagate SV35.5 ST1000VX000 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
-$30.00 Instant
$136.99
$106.99

MoBO
ASUS Sabertooth 990FX AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard with UEFI BIOS
$179.99

GPU
HIS IceQ X H687QN1G2M Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card
-$10.00 Instant
$10.00 Mail-in Rebate Card

$179.99
$169.99

RAM
G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL8D-8GBXM

$59.99

CPU
AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 125W Quad-Core Processor HDZ965FBGMBOX

$119.99

Aftermarket CPU Cooler
ZALMAN CNPS9500A-LED 92mm 2 Ball CPU Cooler

$44.99

Bundle deal - Case/PSU
Rosewill HIVE Series HIVE-650 650W Continuous @40°C, 80 PLUS BRONZE Certified, Modular Design, Single +12V Rail, ATX12V v2.31/EPS12V v2.92, SLI Ready, CrossFire Ready, Active-PFC Power Supply
Rosewill BLACKHAWK Gaming ATX Mid Tower Computer Case, come with Five Fans, window side panel, top HDD dock - Retail

-$25.00 Instant
-$30.00 Combo

$199.98
$144.98

Subtotal: $843.91


Shipping: $13.83 3 day ground


Total $858 approx.


DO NOT NEED....Monitor(will be using a 42" LG LCD tv), keyboard,mouse or speakers.


So what I want to know is:
1) Will this set-up as-is give me good future expansion?
2) Will this set-up run and look amazing on my LCD for games like Diablo 3, WoW, Battlefield 3 etc? 1920x1200 approx res?
3) Is there an Intel build that is as good as these components for the same money that will Benchmark higher?
4) Thoughts on pre-built if it is cheaper with better components? i.e. cyberpower/e-bay etc.

I want to buy this hopefully before 5pm Pacific time today (before bank closes so I can deposit cash of course) or tomorrow at the VERY LATEST.