Think it's a great way to start. I still have my first single stage press, and it works fine for load development. I'm up to four presses. RCBS RS and Summit, Lee Classic Turret and a Dillon XL650. They all have their place in my setup.
The kits are good to start out with, but you'll quickly upgrade many of the components. It's true the Classic Turret can be used as a single stage very easily, but it doesn't have the brute strength that a dedicated Single stage will have. (depends what you are planning to load in the long run!)
I personally don't care for the "breech" lock setup, I use the interchangeable turrets on the Classic, and swap out the dies easily enough on the single stage, but I reload about 8 calibers, so that "breech" setup would get expensive after a while.
Good Luck on your choice