Depending on where you are located physically ... you may want to check out a local discount shop or two in addition to web based purchases. I bought a mobo couple years ago and damnit all to hell if it didn't have problems and I had to wait a MONTH for a replacement (went out and bought one locally by that time). Check return/exchange policies and see if the seller has been rated on gomez or cnet or such and what people say about them

But most of all have fun building!