Thanks guys... Looks like a circular polorizer for both lenses...
Whats your opinions on the most useful protection filters over there, i.e. plain UV or Skylight 1A / 1B???
I currently have a plain UV on the 17-85 so i'll probably just get a Hoya for that. The F2.8 70-200 Canon though is in need of both and (unfortunately for my wallet) because of the high quality lens, needs good quality filters, possibly Cokin or B&W.

