Hi
I use Panaracer xc pro's but I'm not a great fan don't think there to clever on rocky trails and if your in the trees they can clog at tad with pine needle type mulch.
As for them looking skinny I use the 2.1 version and they dont look overly thin (depends what your use to I suppose)
I would class them as a jack of all trades but a master of none. That's my opinion but if you get a set you won't be too disapointed with them.
They are directional but it's the same tyre you turn around from front to back.
If your looking for a winter tyre though probably worth looking at something different.
Hope that's helpful in not slightly criptic
Regards Steve