if you have the budget, I would recommend the proedge. my first attempt at using it for sharpening roughing gouges, spindle gouges and skew produced very sharp results, so there is no learning curve. I like that the I can change grits within a minute and the belts are cheap. what put me off a grinder was that the wheels change size with use, so are not a constant, and the mess of bits flying around. also the fact that you are restricted to a wheel on each end. the proedge allows me to use it for knives, plane blades, chisels etc.
it isnt cheap but when i looked at replacing my cheap grinder with something better, then upgrading the wheels to cbn (cooler running and doesnt wear down), it was competitive.
