Karate Monkey is 27.5+, so I bet if you drop your width down to 2", you could get 29" wheels in there. Two wheelsets, 27.5x3 for trail, 29x2 for road? That would be sweet.

I'm planning on getting a Krampus, and was wondering whether I could get a 2nd wheelset for the road and make that my N=1 bike. Big Apple 29x2.35 sounds like a good option for that (that won't look too silly with that giant fork and relatively skinny tires). Are there any other city/slick-ish tires out there that are wider? 29x2.6? 2.8? 3?