most of my domains are at godaddy.com,
registered one at ipowerweb.com and had a bad experience.
you key in yr credit card details at their order screen, hit submit and everything goes blank.
no acknowledgement, no invoice, nada.
if you're lucky, you can the config info within 24 hrs.
and they use manageSRS to manage yr domains.
a friend recommended i check out
http://www.namecheap.com/ and you can usually google for discount coupons.
godaddy is decent, but i wouldnt say they're the best.