I bought a Wilton Square Wheel grinder almost 20 years ago. It has done everything I ever wanted it to do. Since then, I have bought a BurrKing, a Dozier grinder, a J L Grinder, and have used a Bader grinder at the ABS school in Washington Arkansas. They all work great. I don't think a person would go wrong with any one of them.
The Dozier grinder is really smooth, but it's also expensive.
Of all my grinders, I find myself using the Square Wheel more than any of the others. Maybe thats because it's the first grinder I owned.
By the way, I earned the money for my first two grinders by mowing lawns part time.
I'll be at the Blade Show, table 26-C if anyone wants to talk about grinders.