I know more people who use a Rockchucker than I know who use any other press - there's absolutely nothing wrong with a single-stage. A progressive really shines if you're shooting a LOT (and reloading a LOT) of pistol- and small rifle-caliber ammunition. I've used Dillons (probably the gold-standard of progressives) and never have been able to duplicate the consistency I can achieve with the plain old Rockchucker if my goal is precision. Not to say that I can't turn out a LOT of plinking ammo with a progressive.
I've not been impressed with many of the "torrent" (turret?) presses I've looked at. Save the money and put it into the other accessories you need. It's not that difficult to change from one die to the next in a single-stage press.