Get the Lee Classic Turret and you will have something easily useful. Neither I nor anyone else I know who has a conventional turret finds them much, if any, more helpful than a single stage. Lee has an auto-indexing feature that actually turns the turret after each step and that does save a good bit of time. And, unlike the others, Lee's turrets are easy to swap in a few seconds and are inexpensive enough to make having a head set up for every cartridge you load reasonable.
A Dillon progressive, alone, isn't much different in price from Redding's T-7. But, swapping cartridges in a Dillon isn't cheap, easy or quick.