Bigbear,
Let me put another vote infor the KMG, or perhaps two votes as I own 2 KMGs

When I was looking around and made several similar posts to yours, it seems that the majority of the responses I got were in favor of the KMG so that's what I bought. So far it's been a great machine. Because you can buy just the grinder with no motor and supply your own, it's a solution that you can work into gradually as far as the money goes. That flexability isn't available with any other grinder. I couldn't be happier with my grinders, one bought new from Rob and the other bought in as new condition locally from a young guy that decided he needed money more than a grinder. I started out with cheaper drive options, but just yesterday received a nice box from Rob with my two new KB VFDs as well as a spare tooling arm and another small wheel size

Time to upgrade my machines to a bulletproof variable speed drive option.
I've never heard anyone say a single negative thing about the KMG except one fella cryin because he didn't paint his and it rusted some :jerkit: A couple cans of spray paint would have prevented that and then you even get to pick what color it is
Regarding reversing, that depends on how you power it. If you use a single phase motor, you're going to have to engineer a mechanical reversing option, but if you use a DC drive, or an AC system with a VFD type controller, then you can reverse it with the flick of a switch.
Did I mention that Rob Frink is a hell of a nice guy and is the one who answers the phone when you call with a question?
KMG = Highly recommended!