Under $900 gaming build

Hello, I was just wondering if this build would be good enough for games like Skyrim (low-med settings), Battlefield 3 (low-med settings), minecraft (higgh settings) and WoW (high-ultra settings)? Here is what I have-

Radeon HD 6870- http://www.newegg.com/Product/Product.aspx?Item=N82E168...

EVGA Z68 SLI Micro 120-SB-E682-KR LGA 1155 Intel Z68 SATA 6Gb/s USB 3.0 Intel Motherboard- http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Intel Core i5-2500K- http://www.newegg.com/Product/Product.aspx?Item=N82E168...

4GB RAM- http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Antec BP550 Plus 550W Continuous Power- http://www.newegg.com/Product/Product.aspx?Item=N82E168...

HDD 500GB- http://www.newegg.com/Product/Product.aspx?Item=N82E168...

DVD burner- http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Windows 7- http://www.newegg.com/Product/Product.aspx?Item=N82E168...



I have my own case, but can anyone give me any suggestions? Or is this pretty good? Thanks for all the help!