Hey Guys, building a Gaming Rig for under $900, and I need some guidance

Hey guys so I'm about to buy the parts to build my first computer. I have $900 to spend on it, and I wanted all of your opinions on my build choices. I want this computer to be: -obviously under $900 -reasonable at handling modern games at pretty high quality -cheapest parts vs best performance available -one I wouldn't NEED to upgrade for a few years, but when I do it's easy to upgrade incrementally one part at a time.

WD Caviar Black 1 TB Hard Drive http://tinyurl.com/7s65lwd

Intel i5 Sandy Bridge 3.1-3.4 GHz Processor http://www.newegg.com/Product/Product.aspx?Item=N82E16819115074&Tpk=i5%202400

ASUS SATA Intel motherboard (USB 3.0) http://www.newegg.com/Product/Product.aspx?Item=N82E16813131706

ROSEWILL 650W power supply. http://www.newegg.com/Product/Product.aspx?Item=N82E16817182132

8GB of DDR3 RAM (2x4GB) http://www.frys.com/product/6483582

Rosewill wind ryder case... I'm definitely going to change the case, any suggestions? I used this cheap one as a placholder for my calculations involving price. http://www.newegg.com/Product/Product.aspx?Item=N82E16811147113

Samsung CD/DVD Burner http://www.newegg.com/Product/Product.aspx?Item=N82E16827151236