Just ordered a Hoya 77mm SUPER-HMC
to protect my 24-70L. Not sure if a filter is needed to complete the weather seal (?), but in addition to the hood should provide some extra protection and hopefully keep out the dust 
Anyone using this filter? Are you happy with it? Any situations where you've had to take it off because it was affecting the image?
I'm surprised there aren't more tolls in here spouting the "uv filters are stupid" malarkey. They serve their purpose. All my L-lens are protected--the cheapo lenses go bare.
