gunner,
A Gracey or Giraud trimmer is a LOT faster than the "case prep centers" I've seen, since they both trim and chamfer at the same time. They're more expensive, of course. I can trim/chamfer 20 cases a minutes in my Gracey. All you need is case holders for specific rounds, which are relatively inexpensive.
If you're just trimming a lot of one or two specific cases, a World's Finest Trimmer (WFT) works very well and costs less. It doesn't chamfer at the same time, but used according to the directions, it trims so cleanly cases won't need chamfering. It's designed to fit in a drill motor and costs around $70, but each model is more limited in the rounds it can trim.
