I am in Idaho, about 40 miles from the Montana border. The Xtrainer is the best bike I have owned. I am the same size as you 5'11" 190 Lbs. and I ride exactly what you are describing.
It is great for single track.
It will lug down to almost a stop.
I hardly use the clutch.
Nothing major, they do have a few quarks like any other bike.
My friend has the 300RR, he keeps it at my house and I do the regular maintenance for him. It will not turn as sharp, is slightly taller. Much stiffer suspension. Works for him, I prefer the Xtrainer. And when the single track gets tight, he wishes he had a Xtrainer.