I have run the Conti Cyclocross tires. I don't recommend them for serious singletrack use. (I assume that is what you are after if you're looking at 29x2 tires.) They have sparse, shallow knobs that work so-so in hardpack and not very good in mud or loamy soil. More importantly they wear out super fast... I burned up the center knob in the rear faster than any knobby I've ever had and then the tire really sucked in the dirt.
Note that I haven't raced cyclocross. Perhaps they are good for that in comparison to other tires but I won't buy them again for singletrack MTB trails.
Anyway-- very interesting about the Bonty tires. I may have to test fit them on my Quick CX!