I was going to recommend the Barracuda Jr. from Dyna King but boy have the prices gone up on it. I got mine used at a reasonable price several years ago. I don't use the rotary feature for production style tying very much but it is easy to spin on some materials like chenille. I am too set in my ways for hackle and deer hair. But it is very useful for checking the balance of the flies as posted above. I still use my Thompson A vise quite a bit especially for large streamers and salt water flies.

I would pass on a too cheap rotary and look for a good used one if possible.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli