I have been using a roll sizer since the late 90s.
Started off with a CarePro and am now using a Roll Sizer. I love mine. It can chew through a 5 gallon bucket of brass in an hour or two depending on the caliber. My old case pro was awesome, but slow. However it did clean up the rims and the owner could make dies for whatever caliber you wanted.
If I was starting over I would take a hard look at the new roll sizer from Poland. It looks to be a better machine than the RollSizer.