Times like this, I wish I could down-vote.

GoDaddy is popular, but it's a terrible service, has underhanded billing, foists misfeatures on unaware domain purchasers, and uses sexist advertising.

http://nodaddy.com/#horror

I recommend Gandi.net (upvoted the previous submission below).

Price is not the only consideration -- your time is worth something, and the practices of your business partner mean something.