What will be the tallest wheel set able to go onto the bike? This will at least give you the most clearance. I bought a troll in part because of the versatility of tire options, and the bb is already mtb ish high. I've had it set up in mtb mode with riser bars and 2.5 knobbies, but have 2.5 extraterrestrials to go on stuff like in your photos.
very pretty area btw, the farms remind me of areas in northern Vermont
troll as it is now, with 2in slicks