I looked at both the AP LnL and Dillon 650 when I went with a progressive press from my Lee Classic Cast Turret about a year ago. I wasn't interested in the manually indexing 550. I believe that both presses work very well and each has it's pros and cons. Service and support from Hornady has been stellar, which Dillon also prides themselves on.
In the end I went with the LnL for only 3 reasons. One, it was much less expensive(especially with 500free bullets); Two, I really didn't need a case feeder option; and Three, I can get accessories and parts from a number of sources, unlike Dillon.