I started with a hornady trimer works fine but is slow like I think most of the other trimers will be. I was given a RCBS and man is it fast simple to use with it cam lever type holder. Its not the powered trimer but the trimer part of it is the same. You can also get the 3-way cutter (one per caliber) and the deburing and chamfering is done when you trim.

Unless you are seting up benck rest cartridges get the RCBS If you are get the wilson trimmer from sinclair Int.