new build Building a gaming system

Hello everyone,

I have decided to try and build myself a gaming computer instead of going out and buying one. I really want to get parts that fit my needs. I am definitely a beginner at knowing what I need and how to put it together, but I have been doing a lot of research so I am learning a little bit. I have some parts picked out on newegg.com, but I have no idea if they are all compatible with each other. I am really looking forward to the new Simcity coming out in March and I want this to be able to play it very capably. Also, I am wanting to play other games including The Sims and Civilization just to name a couple. Here are my parts:

Case - http://www.newegg.com/Product/Product.aspx?Item=N82E16811119246
Hard Drive - http://www.newegg.com/Product/Product.aspx?Item=N82E16822148910
Graphics Card - http://www.newegg.com/Product/Product.aspx?Item=N82E16814130809
Power Supply - http://www.newegg.com/Product/Product.aspx?Item=N82E16817171038
CPU/Processor - http://www.newegg.com/Product/Product.aspx?Item=N82E16819116774

Obviously I still need RAM and a motherboard, but I'm not sure what I'm looking for in a motherboard. Any advice received would be greatly appreciated. Thank you.