So I put on the T-rex slider set (wheels, engine cases and frame sliders), filed down the sump bump and put in the mazda oil plug and fitted an SW Motech skid plate. All because I like to ride far from home and explore places only reached by dirt roads. If I can keep a low speed slide or tip over from ending a trip and seriously inconveniencing my friends - well then it was money well spent.
One other thing is that if the thing that sticks out farthest from the bike isn't your leg, you might get thru a low side with less damage.
If I were to redo my setup, I might consider the SW Motech crash bars in addition to the other T-Rex delrin sliders. I ran across a comment somewhere that said frame sliders are a little below the bikes center of gravity, so it might tip and slide on the upper part of the bike.
For a little over $300 the T-Rex slider set is a great deal of protection. Cheers