Some of the suggestions above are biased toward; the more you pay the better it is. I have usually found the Lee equipment has unique features. That gives you real value for your dollar.
Their case trimmer trims every case to the exact length by their patented trimmer design. The trimmer passes through the flash hole and stops against the lock stud so length is exact on every case and the mouth end is perfectly square to the axis of the case. Cost is dirt cheap compared to other systems.
Check their website
www.leeprecision.com