I have a Lee classic Turret, 2 pro1k's, a loadmaster and a 650xl and I use all of them. I could never get the loadmaster reliable for 223 but it is perfect for 9mm. The 650 is superb for 223 especially since I added a Mr BF. I also convert it to 9mm for my son and I to reload simultaneously. All are good tools just different approaches to doing the same thing.
For 9mm, I think the loadmaster is a much better value than a 550 though...also the Autodrum pro powder measure is very consistent...I wish it would fit on the 650.