Just wanted to put up some pics of my KMG for Colin here, as I am working on a little project for him at the moment. Notice the multiple use of the driveshaft to power my double-sided disc sander.
I can just loosen the tool bar on the disc sander to release tension on the drive belt and just let it sit to the side when I'm not using it.
Yes, the link-style drive belts are very expensive, but they are infinitely adjustable and last forever. They also let you be a little more creative on how you set up your pulleys too.
Mounting the motor under the bench is a really cool space-saver:
My sander is slightly underpowered, with only a 1hp motor, but it does work fine for me. Done lots of knives and swords on it. At some point I'll upgrade to a 2-3hp 220 unit, so if you are getting one, might want to start with that. Also, the variable speed controller is nice and I use it lots, but if you can't afford the extra $300+ on the controller, remember speeds can be reduced with multiple pulleys and is much, much cheaper... just not as convenient.
Also, I believe that the variable speed controllers tap into the torque of the motor, (mine is really old - maybe newer ones are better.) Another reason to get a little more motor than you think you might need.
-M