Buehrle - pretty easy choice. Whatever flaws Mazara and the bullpen may face, having a rock solid, dependable, and at times great SP to fulling anchor the rotation seems to me something you could add to virtually any team and make it better. Giolito may well be that guy moving forward, but so far he's only done it once. And even if he DOES become that guy, well, then you have two of them. I like the potential of the Sox current rotation options once everybody's healthy, but give me Buehrle and I breathe much easier.