I started out with a Grizzly grinder like a lot of other people. I turned out some decent knives using only that machine. I still use it all the time. It is a great starter machine. There is a lot of information about them on all the various knife forums. I would recommend getting one to start out, but if you are serious about knifemaking, you will want to step up to one of the more expensive grinders. I recommend the KMG-1. Do a search on the forums, and you will find a lot of info on various grinders.
Kyle Fuglesten