Sooooooooooooooo, I finally bit the bullet and ordered up a 60D; need it to go with the nicely used JD MCS with Power Pack that I picked up last week. The MCS doesn't look right without a mower deck for it to attach to and it doesn't really work as intended either, lol! I did use the MCS this weekend to suck up a giant pile of leaves, albeit with the assistance of a rake to shove the leaves into the tube, but the Power Pack ground the leaves up and made life easy and fun!
The Honda GC160 needs a little carb work, but has great compression and doesn't need more than about 40% throttle to take in whatever the tube will flow without struggling. I actually bought a brand new Honda carb for it and will flush out the fuel tank (fuel smells a little stale) and put in some fresh, non-ethanol fuel with stabilizer for the winter rest. The Honda carbs are cheap, $27 complete and ready to bolt on. I also picked up a new spark plug, Honda air filter, fuel filter, and all the gaskets to make sure there are no air leak issues once the carb is replaced.
Think I'll replace the fuel tank cap and a few other little odds and ends and she should be as good as new!