What tripod head would folks recommend for a (relatively) lightweight Canon 50D + 400mm f/5.6L combo? Arthur likes the Mongoose M2.3 Action Head, and doesn't like the Wimberley II for such lenses. Is that the general consensus? What about the newer Mongoose heads?
If it makes a difference, I have Velbon El Carmagne 630 CF legs I originally bought for my spotting scope. (I'd rather not buy new legs and a new head if I can get away with it.)