I think you will find that the vacuum set up is much easier to work on and cheaper to fix if necessary. That Powermaster was always breaking down. I changed it twice before converting to vacuum.
Mine work ok and have never failed since the conversion, but are not what I would consider top notch. They at least work as well as the Powermaster set up. Others on forum have reported great success with the conversion.
Your wallet will like it.
I just reread your post. You have already made the decision and are wanting a place to do the job. Can't help you there, as I did the work myself. Others will chime in with their opinions.