I use the O/E guards and I think they are the best protection in a fall. Weather is not a concern as I don't venture far in winter/wet/ cold crap. Or wear proper gloves.

I had acerbis handguards but took them off. They felt really cheap and were a ***** to fit. Then again I'm not the most practical person so you may have better luck. You may want to look for some that incorporates bar end weights in some form as the vibes were pretty noticeable without