Like many I started with the Norton wheels and a cheap dresser. Then I bought a better system for dressing the wheel and drill bushings to stabilize it better. Noticed great improvement in quality of grind, but wheel started disappearing quickly. Faced with the prospect of buying new wheels every year or two, I bought a CBN wheel that had recently come on the market for a reasonable price. I sold the dressing system at quite a loss. Later bought a 600 grit wheel to go with the 180 grit that I had. I use a cheap 6" Ryobi grinder with the factory wheel and wire brush for other tasks.
Retired - when every day is Saturday (unless it's Sunday).