Budget Gaming Machine, Need feedback

Hi, I've been picking out parts for my first build and I was hoping I could get some feedback on whether the parts I chose are the best for the price. I'm trying to build a PC under 850$ that can run the latest games without a sneeze. At the moment I have:

CPU
AMD Phenom II X4 955 Black Edition Deneb 3.2GHz Socket AM3 125W Quad-Core Processor
http://www.newegg.com/Product/Prod [...] 6819103808

GPU
Powercolor AX6850
http://www.newegg.com/Product/Prod [...] 6814131374

Motherboard
BIOSTAR A870 AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard
http://www.newegg.com/Product/Prod [...] 6813138324

Case:
Rosewill Challenger Black Gaming/Rosewill Hive Continuous 650W
http://www.newegg.com/Product/Comb [...] mbo.722908]


RAM
Kingston 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory Model
http://www.newegg.com/Product/Prod [...] 6820139075

OS
Microsoft Windows 7 Home Premium SP1 64-bit - OEM
http://www.newegg.com/Product/Prod [...] 6832116986

Hard Drive
Seagate Barracuda ST31000524AS 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
http://www.newegg.com/Product/Prod [...] 6822148697

Optical Drive
ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner - Bulk - OEM
http://www.newegg.com/Product/Prod [...] 6827135204

Adapter
Rosewill RNX-N300X PCI Wireless Adapter
http://www.newegg.com/Product/Prod [...] 6833166051

Monitor
Hanns·G HZ201DPB Black 20" WideScreen LCD Monitor w/Speakers
http://www.newegg.com/Product/Prod [...] 6824254055

So, any advice on changes, etc? Thanks.

You havent included any prices so its awkward for me to suggest tweaks.

One thing i would suggest though is ditch the sound card, the onboard sound of the motherboard will be fine and then you can use whatever money is saved to up your graphics card.

Its a pretty cheap sound card aswell though. To notice any real difference in sound i think you need to be looking into the sound cards more like $100+

I completely forgot about this thread. Anywho, the check for this rig is going to clear tomorrow, so I think really the only thing left in the air at the moment is the case, which I accidentally created a new thread for.