I bought a couple CNC vises from Enco they are on sale right now and they look pretty good. I will know more when I use them but I just wanted to pass it on because they were so inexpensive. They are on sale right now for $179 and I had a code for another 15% off so I ended up getting the pair for less than most of the imports cost for one unit. I used one of the Enco vises on my manual machine and it was just OK these actually look really nice. The casting on the first one I bought a few years ago were like a lot of cheap import stuff but these look good. Here is a link to the ones I bought.
Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies