I use godaddy for registration (through their "Discount Domain Club") which reduces the cost to about 8 bucks per domain per year. I like their customer service

I use godaddy for registration (through their "Discount Domain Club") which reduces the cost to about 8 bucks per domain per year. I like their customer service and how quickly the nameserver changes seem to propogate. I usually use Route53 (aws) for the actual DNS.