I am with Moniker too. I have not tried their new ticketing support system, as I should just to see the response time, but before it took 4-5 days to get a response to emails IF I got them at all. Overall, Moniker is the best choice as of right now.
If the Snowe bill goes through unchanged, no US-based registrar will be safe.Fabulous.. hmmm. First, they are located in Australia. I could see problems with that. I had some problems with them years ago, and I don't use them anymore. I don't recommend them.
Moniker is the clear cloice!!
An Australian-based registrar will look awfully attractive in that scenario.
Tucows has the best system I have seen. It is slighly more expensive but it is more flexible.