Jeff,
do a little bit of research on grinders. You will want a finer stone for your grinder for sharpening turning tools. There are numerous types of grinders: Water grinders, dry, coarse stones, fine stones, belt sharpeners, CBN wheels, Scary sharp (using super fine sandpaper on glass).
I started off with a grinder for getting to shape but used the scary sharp method for fine tuning my tools for turning. The scary sharp method uses a flat plate of glass or smooth steel/aluminum that doesn't flex and putting adhesive backed sandpaper strips of different grades such as 600 then 1000, then 2000.. Drag the tool over one grade a couple of times, then on to the next grade etc. Finish by stropping it a couple or three times on a piece of leather.
I don't know how much you want to get into sharpening and you can do as much or as little as you wish.
Here are links to two threads here on IAP concerning CBN wheels.
http://www.penturners.org/forum/f30/cbn-wheel-question-s-147589/
https://www.penturners.org/threads/cbn-wheels-for-grinder.155103/