Beltran- should run some more this year. Risky, but he definitely has the most upside by far.
Sheff- getting old, but man can he hit.
Matsui- numbers aren't out of the world, but he's as sure a bet as anybody. In the heart of a very productive lineup, too.
CLee- more of a risk than Matsui and may not hit for as high an average (or he may), but he'll get you double digit SBs. 2nd year in the NL might mean an increase in BA. Hopefully managers have his 2nd half more in mind than his 1st.
A. Jones- could outproduce the field, but I wouldn't want to be the manager caught dead if he doesn't. Will go too high to bother risking.