Vlad has been unlucky with injuries the last couple of years and still posted a very solid line. High average, good deal of RBI's, and I think he bounces back to 30-35 HR. Surely, he's still at an age that won't slow down his power stroke.
Beltran could easily top the list with his 5-cat potential, but year to year, he's been relatively hit-or-miss as far as his consistency goes, as the health of his legs have been pivotal to his success or underwhelming numbers. His home/away splits are pretty bipolar, but he's hitting in a lineup with plenty of support. Appears that he'll hit cleanup and there could be a marginal spike in RBI.
Lee is as solid an offensive force as Vlad whereas Ichiro's value tends to tie into his SB and BA.