Only one I have used it Lee turret, so I can't say it is the best. I like it cause I can leave the dies in turret. I have turrets for every caliber I load. I don't understand why anyone would even own single stage. You can operate a turret like a single stage if you want. Unless the play in the turret is an issue.
I usually hand prime. Though I migh look at getting one attachments that feeds primers from a hopper.