I'd rather not see Youkilis at 3B long-term for the simplistic reason that he is so gifted defensively at first. But it's a lot easier to acquire a power bat that plays first as opposed to the third so seeing as Youkilis plays a solid enough third base, the answer really depends on who's playing first long-term. For example if the team acquires Adrian, it would be an absolute pleasure to have Youkilis at third.