Little crow gunworks world’s finest trimmer. I just have a cheap ryobi cordless drill with one chucked up 100% of the time. Stupid fast, stupid consistent, stupid easy to use. Can’t recommend it enough.
Everyone will say Giraud, $500. I haven't used it, but good reviews. If you're looking for just a basic one. The Wilson case trimmer is not bad. Bought a Lyman my first time, big mistake. But, everyone has there preference, or opinion. I say just find one that fits you, and go with it
I love my Henderson trimmer. If you can't afford the full unit you can always buy the trimmer w/o the motor and run it off a drill. If you do go this route and have to buy multiple cutters, spend the extra $ to have them pre-adjusted....I've found them to be a PITA to get adjusted just right.
RCBC trim pro with power set up and 3-way & lee case lenght gauge timers on my Lyman prep station.
Both work good. Trim pro just take time to set up, but then its a time saver.