No doubt the Renzetti is a decent vice if you're not going to tie a bunch and want the ability to use the rotary function. I used one when I first started tying but after a few sets of jaws and a few replacement sets of new bushings I moved on to a few others.
The Regal is probably the best for the money, absolutely bombproof, and you just can't go wrong purchasing one. If you want/need the rotary function the higher end Renzetti's are good and the DynaKing Barracuda is fantastic.
I've been tying for over 25 years both for my own stuff and professionally. When I sit down to just tie trout and normal steelhead stuff I grab the Regal but if I'm tying Atlantic Salmon or Spey patterns I will grab the Barracuda for the extra versatility of wrapping ribs or silk with the rotary function.
If you really want the best, try and find a Law vice. I've been looking for years for one in good condition but I haven't been able to find one.
Buy once, cry once