I'm currently 65, and while I don't have a complete MM set up such as the one you linked, I am pretty close at something like 5-48-2. I'd say this is a personal decision. I have never had a problem questing with my MM hunter. I solo just fine and do well in groups.
Aggro can be an issue; be prepared for your pet to lose aggro once in a while, but if you use your pet well, can kite, and use traps and FD effectively, then you should be fine.
I know a few BM hunters and they do well with those characters. Personally though, I feel like I have more fun doing DPS with my hunter rather than my pet.
I think both are good routes to go. I think a good player can do well with either MM or BM. I'd say try both and see which one you like more.
Edited, Feb 12th 2008 6:28pm by bfotinak