Look Keo Carbon Pedals

[VeloVT]

This is the first of a number of accessory questions for my new bike.

I currently have a pair of Ultegra pedals that I like. I was thinking I'd keep them when I sell the old bike and use them on the new one. But then I got to thinking, the new bike is lighter than the old bike, and with lighter components it will be even lighter.

I started looking at the new Dura Ace pedal, but then noticed that the Look Keo Carbon pedal is considerably lighter and not any more expensive. So, I was hoping maybe someone who has used them could give me a review...

--what do you like and/or not like about the Keos?
--if you've used Shimano spd-sl's, how do they compare?
--how are the bearings? I ask because there is actually a noticeable difference between my Ultegra pedals and bf's Dura Ace pedals in this regard. If you "flick" the Dura Ace pedals on the crankarm with your hand, they spin much easier and with much less resistance then the Ultegra pedals. Wondering how the Keo's compare?

thanks!