Opinions and Compatibility Concerns on gaming PC build

Approximate Purchase Date: Sometime soon.

Budget Range: $900 - $1100

System Usage from Most to Least Important: Gaming, Web Surfing.

Parts Not Required: Monitor, Speakers, Keyboard, Mouse.

Preferred Website(s) for Parts: Amazon, Newegg

Country: USA

Parts Preferences: Well... what I've selected so far, unless something is wrong with them.

Overclocking: No.

SLI or Crossfire: No.

Monitor Resolution: After I get a new monitor, it will be 1920 x 1080

Additional Comments: I've done some more research on different parts and I think I've found a build I like, so I'm here asking for some opinions on it and to see if it's compatible and gaming ready. I'm mainly using this for gaming (Oblivion, Skyrim, Fallout, Dragon Age, Bioshock, Half Life 2, Minecraft, etc.) and casual web surfing.

I'm hoping the parts that I've chosen are good, because I keep changing my mind and changing something at the last minute. I just need the games to run at mid-max settings, with no lag of course, but they don't have to run at exceptional quality.

I'm basically just looking for a thumbs up or a thumbs down, and if it's bad or somethings not compatible please describe why and what I should change. I'm eager to get started building my first gaming PC, but I want to take my time as well, which is why I'm here asking the pros for some opinions. Any help is appreciated, thank you.

Case: Rosewill CHALLENGER Black Gaming ATX Mid Tower Case

PSU: CORSAIR Gaming Series GS600 600W

Motherboard: ASRock Z68 Extreme3 Gen3

CPU: Intel Core i5-2500K

RAM: G.SKILL Sniper 8GB (2 x 4GB) 240-Pin DDR3

GPU: GIGABYTE Radeon HD 6950

HDD: Western Digital Caviar Blue 500GB

SSD: Crucial M4 64GB SATA III MLC Internal Solid State Drive

Optical Drive: ASUS 24X DVD Burner

OS: Microsoft Windows 7 Home Premium SP1 64-bit