Joe: what knobbies did you go with, and can I presume this was on Versys-X 300 or 650? I just ended up buying Shinko 804/805's because the trails I want to ride are almost 100% sand in SC, and I need to ride 1 hour in comfort to get to them. The good 70/30's and some 50/50's just didn't seem to have good reputation in sand.
I run the common TKC80 front and E07 rear, well tried and tested by others here. I've got close to 6,000 on the set and I would say 50%+ left, I'm about 180# fully geared. I've got a gen 2 650. I lust after your wheel combo.....
FWIW, I can tell you from an ADV training session where we had a 500ft sand pit to learn in, full tire pressure (mid-30s) and I couldn't keep the bike upright more than 50'. Drop the pressure to low 20s, rode like a champ with the 'secret' to sand - drag the rear brake just a bit - and made the entire pit back and forth with minimal difficulty and no drops except the U-turn. Of course, you have to carry some form of inflator.
Dragging the rear brake works to get the bike to behave in any loose stuff, but saves my butt in sand.
Second FWIW comment - I've run the TKC80/E07 combo harder on the asphalt twisties than I ever did the trailriders, and I've yet to approach a loss of control moment due to grip. The Shinkos get pretty great reviews, so you're probably going to be happy.
Have you ridden a 650 V? Would you swap to either if you could? Considering a lighter bike for the rougher stuff, attracted to the V300x but love the HP of the 650....