A1:
My biggest gripe with monoculars is that, with binoculars I can be looking at an object with my naked eyes, then bring the binocs up and be right on target.  With a monocular, I have to bring it up to my eye, then search all over the place for hte target.  Just doesn't align automatically, at least for me.  I also have a harder time holding the monoc steady than I do binocs...
A2:
I have never owned 10x, so I can't help you there.  But I suspect that you could provide hte stablization yourself, as suggested by others...
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OBG