If rotary is a requirement: Renzetti.
If you want an all-around solid performer: Regal.

I have a Dyna King Barracuda Jr. It's a very slick-looking, full rotary vise on a pedestal. What sold me on it was the "universal" jaw, which is advertised to hold a wide range of hook sizes without slippage. It works great for hooks size 12 and larger, but I have yet to figure out how to get it to grasp smaller hooks and hold them under any amount of pressure. I don't tie many flies in smaller sizes (I usually buy the small stuff - those kids in Malaysia tie MUCH better small stuff than I ever could), so most of the time this vise works great for me, but there have been occasions where I have had to resign myself to tying smaller stuff, and in those cases, it has frustrated me more than a little. I learned through a little research that there was a midge jaw available. Thinking that might solve the problem, I bought one, but it has been even less successful at holding small hooks.

I have decided, after carefully observing the movement of the jaws as I lock them down, that the cam lock that holds the jaw setting is to blame. When the cam lock is fully engaged, the jaws actually back off ever so slightly. For whatever reason, this doesn't cause any problems with hooks large enough to fit in one of the two hook bend holds in the jaw, but with hooks that are too small to fit in the grooves, the backoff compromises the hold.

Long story short is that while my vise is great for 98% of the flies I tie, it is nearly non-functional for the other 2%. When the only flies that will catch fish in a given situation (spring creeks come to mind) fall into that 2%, the issue becomes nothing short of maddening. For this reason, as great as it is for larger flies, I would not recommend a Dyna King to anyone who plans to tie small flies with any regularity. From what I remember, Renzettis have a different locking mechanism, and I suspect it would work better for the small stuff.

With hindsight, while I like the speed afforded by a rotary vise, I think the best all-around performer would probably be a Regal. They have changed their design relatively little over the years, presumably because it flat out works. Most of the best tyers I know (I certainly don't fall into that category) use a Regal, if that is any indication. Besides all this, a Regal is about $200 cheaper than a high-end rotary model.

Merry Christmas.