SPF 30 for me. I still get some colour cause my skin is so darn fair. As for the waterproof sweat proof stuff I don't buy it. I've used Coppertone Sport which is supposed to be both of those and it still ends up in my eyes. I find a bandana works well for keeping the sweat out of your eyes and keeps you from getting the waffle head look when the sun tans your head through the vents of your helmet. Especially if you have short or no hair at all.
__________________
"No drug, not even alcohol, causes the fundamental ills of society. If we're looking for the source of our troubles, we shouldn't test people for drugs. We should test them for stupidity, ignorance, greed, and love of power." -P.J. O'Rourke