I take the Yankee rotation right now due to a few things. First off, the yanks have 7 proven big league starters and a farm system stocked to the gills with talent. The sox have 3 proven MLB starters, 2 relievers, a guy with an imploded shoulder (Cook) and a reclamation project coming off neck surgery in Padilla
Second, the injury factor. Buchholz is coming off a fractured vertebrae. Nobody knows how he returns. Beckett is entering an even yr, which for some strange reason seems to mean he sucks. J/k, he always seems to get out of shape after a good season and get hurt. Then he gets motivated after a rough yr, gets in shape and dominates. Lester, even in an off yr, is a top notch pitcher. Regardless, the Yankee rotation has youth, experience, power, endurance, and depth. It's gonna be hard to top