Keo Sprint do well for training and Keo Ti Carbon are nice for racing.
The Keo Carbon Ti come race ready, they all ready have gone threw a test of load bearing rotations. The rotation is silky smooth.
One of my older Look pedals weight more then two of the Look Keo Carbon pedals. Very noticeable on the pedal stroke and well worth the extra $$.
For commuting I use greyhound track pedals with plastic clip ones from mec. They have a sealed bearing which does well for one winter. Salt and sand mixed together to a great job at braking down grease while wearing out any metal part.