GoDaddy.com - Go Daddy provides domains at a very reasonable price and they have excellent customer service.   The one negative is that when you buy a domain name, you will have to scroll through a lot of other offerings before you get to checkout.  Look for a small link at the bottom that says "Skip - go to checkout" if you dont wish to look through all of those other services.

Network Solutions - this is the original and most widely used domain regstrar.  However, their prices are markedly higher.  Some feel more secure using them,  though, so we want