I bought the 750 instead of the 550 because I planned to load 9mm, 40, and 223 on it. If all I were going to load was 38/357 the 550 would be plenty.
But let me play devil's advocate in favor of the turret design here. I had a Lee Classic Turret for awhile and it was the mutt's nuts for 38/357. The only thing I disliked about it was the primer feed and the Auto Drum measure. The turret itself was great. With four die stations you can throw powder on the press and seat/crimp in separate steps which to me is the way to go. You can set it to auto-index with every pull of the handle or index manually by removing the index rod. The turrets are dirt cheap and fast to swap so you can leave complete cartridges set up and swap over in seconds. It's really a very smart machine if you don't mind feeding primers by hand (the primer feed system sucks). It's also smaller, lighter, and cheaper than most single stage presses. It will load cartridges up to 338 Lapua in length.
Or, the other end of the spectrum would be the Redding T7. Big, heavy, built like a tank. Seven die stations on removable tool heads but they are 6X the cost of the Lee turrets. You could have a four die 38/357 set, a two die rifle set, and still have room for an accessory die, all on one tool head. RCBS makes a turret that splits the difference with six die stations and optional indexing.