I use the good ol' Park Tool grease. It's got a good reputation in the bike world, doesn't cost much if you just need to do the occasional maintenance at home(under $10/tube - you could do several full bike builds with a tube), and the little applicator tip is more convenient and a lot less messy than bulk greases. I tried a couple others but went back to the Park since I don't need to worry about buying huge quantities at the cheapest price possible like a bike shop or something. It's good for everything from derailer wheels to bearings. Any decent quality bike grease(and some others) is good for most any maintenance on a bike unless the part states otherwise(some forks and other specialty parts).