Some ideas:
Google's Cloud DNS: https://cloud.google.com/dns/pricing
Route 53: https://aws.amazon.com/route53/
Dns Made Easy: http://www.dnsmadeeasy.com/
Dnsperf.com is also a good resource to compare speed and reliability of DNS providers.
Google's Cloud DNS: https://cloud.google.com/dns/pricing
Route 53: https://aws.amazon.com/route53/
Dns Made Easy: http://www.dnsmadeeasy.com/
Dnsperf.com is also a good resource to compare speed and reliability of DNS providers.
It's fine for business use with a support contract.
I've heard good things about AWS Route53 as well.
I can't say how happy I've been with their mostly out of the way tooling... the two times I needed support using the callback option worked out for me. Far easier than getting support for anything else google, but it's been great so far...
Even tried the dyndns for an a-record, which has worked well enough.