I have an old Hornady Pro-Jector (the predecessor to the current LnL AP, which is a refined through evolution version of my old press). I also know Mike Dillon (primarily through our mutual interest in old warplanes, and having both been based at SDL for many years). Dillon makes a great press, and has outstanding customer service. Hornady also makes a great press, and has outstanding customer service. The LnL is the equivalent of the Dillon 650 in operation. The difference comes in price (Hornady is quite a bit less expensive than Dillon) and ease of caliber change (the Hornady LnL is faster and easier to change caliber, in my experience, especially if going from large to small primers, or vice versa). The Hornady is also less expensive if you want to make relatively fast caliber changeovers, as a complete set of LnL bushings is quite a bit less expensive than a Dillon toolhead for each caliber you want to load. I've found changing calibers to be not too difficult or terribly time-consuming on my Pro-Jector, which requires screwing each die in or out, once the dies have been set up properly. However, the LnL setup does appeal to me. I am considering buying a new LnL for multi-caliber use (mostly .38/.357, .44 Magnum, 9mm and .500 Magnum) and leaving the good old Pro-Jector set up as a dedicated machine for .45 ACP, which I load a lot of. Changing calibers on my old Pro-Jector isn't too bad, but it's a snap on the LnL. My vote is Hornady, but sure wouldn't be offended if you choose Dillon. Either will serve you very well.