I have a KMG also. I love it and it is night and day versus a 1x30 or something similar. Here are some thoughts though:
Direct drive is fine if you have no intentions to water cool your grinder. This is something I had never intended to do at first but the deeper down the knife making rabbit hole I go the more I understand the benefits of having the option. So down the road I may water cool it, still playing around with post HT grinding though! I would NOT water cool a direct drive. Also I like that if I decide to use my motor and vfd for something different or a new grinder, I can make this multi speed with pulleys and a cheap motor, where you can't do that with direct drive.
As mentioned above I too do not like how the work rest mounts to the grinder on the KMG. It mounts on the tool arm and that is just a bad design to me. It should have its own slot like the tool arm so it can be easily adjusted or rotated 90* if you mount it horizontally.
I planned on mounting it in a way that allowed me to use it horizontally or vertically but now after some thought, the way I was going to do it would cost more money, I planned on making it nice. In the end it won't cost me that much more to build a permanent horizontal grinder. Personally if you do this enough, just changing belts gets old let alone flipping it on its side and what not. This is why a lot of guys have several 2x72s.
In closing, I think there are several really nice grinders out there to suit your needs. They all make a 2x72 belt spin really fast and have a table in front of it. To me it comes down to power plant. For once I did something right the first time and I went from a 1/3HP 1x30 to a 3HP Baldor and KBAC VFD. I don't care what size the belt is I can do some serious grinding with that motor and VFD combo!