you have exceeded my knowledge of appropriate tires...
the only input I have, is that I like the oem bridgestone trailwing 19/18 on my dr200 (they are different from the dreaded deathwing TW41/42 on the dr650)
...because they stuck well enough on street to do a supermoto day:
http://i47.photobucket.com/albums/f1...3/IMG_0724.jpg
and urban adventure wheelios down the streets of long beach
http://i47.photobucket.com/albums/f1...h52m54s243.png
and well enough in the dirt to do (moderate) hill climbs:
https://www.youtube.com/watch?v=40OJaq7WrjE
so for dirt roads, I'm sure they'd rock out