I'm a big fan of Race Face seatpost. The adjustability factor on these things is such a breeze. Want to change the ange of your saddle? Just loosen one bolt, tilt that sucker forward or back, and retighten. Want to raise or lower your saddle? Same thing...loosen one bolt, raise or lower, and tighten. There's no loose bolts or anything that you have to deal with. On top of that these things are pretty darn cheap and fairly light...I just ordered this one for my Jamis Xenith SL...can't beat $25 shipped for a 235-250 gram seatpost.

http://www.pricepoint.com/detail/178...post-Black.htm

I've got Race Face seatposts on my Caad9 and Felt FC as well. I don't know why these things don't get more love.