I've had a turret, a Lyman Tmag, I no longer own it. I never found any advantage really over a regular single press other than the ability to have several dies set up at the same time. If you think you'll turn the turret for a full reload of one cartridge with out moving it out of the press, think again. What you'll do is batch process just like on a regular press, it's faster than turning the turret or so I found, YMMV.
For a turret press to rotate the head, there had to be some clearance built in or the head could not rotate. That clearance will allow the head to flex out of alignment when you apply the pressure of sizing a case.
Later after the Tmag, I got the Bonanza (Forster). It is as fast or faster die changing than the Tmag plus you can use as many dies as you have. It take longer to get the dies out of the cabinet than to change and you never have to "reset" a die because the lock ring is never moved. Just pop in a sizer die, do your sizing. Pop in seater, do the seating. If you happen to miss a case just pop the sizer back in 2 seconds later you're sizing again.
If I just had to have a turret, it would be the Redding T7, it is just flat out made better than the other turrets out there.