I've been using a Griffin Montana Mongoose and very happy with it for the price. Quick, easy adjustments and holds a hook great. Also comes with quite a bit of accessories and a decent case for it. Good rotary for quite a bit less than the Renzetti's. If you want a good vise but don't want to dump a ton of money on it right now check it out.
Griffin Montana Mongoose Fly Tying Vise, Rotary Vise fly fishing gear