If all you are going to do is trim, champher and debur, get the RCBS trimmer with 3 way head. Take the crank handle off and chuck the shaft into your 1/2 inch electric drill. Now you have a power trimmer that does all three. If you are going to use the RCBS to swage the primer pocket on military brass, you are better off getting the Dillon product.
I have the trim master and, after getting the three way head, have put it in the closet.