GoDaddy.com: Your Best Chice For Low-Cost Domains
Either way, I suggest using godaddy.com to either purchase your new domain name(s) or transfer existing ones. You'll save good money.
For example, I registered my camp's domain name, http://www.alohabeachcamp.com, at godaddy for only $6.95 whereas other registrars wanted up to $15 or more. They even have a deal where you can get a domain name for only $1.99. Check it out.