I've been happy with my KM2's. Been on 2 runs so far including 600 miles in Death Valley and they've held up well. Very little chunking which plague's a lot of MT's.
As for fitting at mid perch, you're going to be out of luck. They are not 35.5, they're 36.8"s tall. Every tire manufacturer has a spec sheet which will tell you the actual size of the tires. Here's the KM2's:
Mud-Terrain T/A KM2 | BFGoodrich Tires
I tried running 36's (which are a 35.5) with 0 offset wheels, and I've damaged my fenders. I did a lot of trimming which solved the problem for the street. However, once I took the truck to Death Valley and really started using the full suspension travel at speed it messed them up. Both my fenders are out of alignment and pushed up and the passenger side has a crack near the a piller from being shifted. I'm going to be ordering up the boatec fenders soon to remedy the issue.
If you were to run your stock wheels or a wheel with a stock off set, you could get away with it. E63 has a build thread and outlines how he was able to make it work. E63 was on the same run with me in Death Valley and had no issue with rubbing. It also helps that he's got Fox 3.0's because they keep the suspension from bottoming out like the stock 2.5's allow. The offset of of your methods would not work though.
