I think the biggest reason for self Build crashes is probably poor Power Supply choices. And I notice you dont have one listed. That and the motherboard are probably the two MOST important pieces to the PC. everything else can be replaced and/or wont effect anything else when it goes out.
I wish I could help you out more, But Im not one of the many Gurus around here, and since its late you might have a bit of a wait before seeing an answer to you question, but trust me....youve come to the right place. Just stick around and these guys will help get you set up.
Meanwhile you might want to take a good look at this:
It will get you started in the right direction. If no ones helped you tonight, make sure you come back. you dont want to miss this! LOL