Gday Gino and welcome to CoffeeSnobs.
The Rocky grinder is a fine piece of kit and if it looked after, should last you a liftetime.
I owned a doserless version, others have the dosered version. I wont go into the pros and cons of each, as there are countless other discussions about that elsewhere here.
Have you considered any other grinders, or is your heart set on a Rocky? Im not trying to talk you out one by any means, but there are alternatives that may or may not be more suitable to your needs. Just a thought.
Another thought, where you buy the grinder from is just as important as what type of grinder you buy. Check the sponsor list to the left of the page (if you havent already), and you will get a good quality product with good quality service.
Good luck with your purchase.