I like the idea of two single stage presses so I can measure case lengths after expander die, with turret or progressive once the piece of brass is on the merry go round it doesn't come off until it is loaded and crimped. That means it is a little late for measuring with dial calipers until the cartridge is loaded. If you are starting out I would buy the single stage kit, includes the items needed to reload without the fancy stuff, don't worry once you have it down you can always graduate up to the faster action on a progressive.