I like Ubaldo.
Just looked at the Yahoo "experts". Ubaldo was ranked higher than Cueto by 3 of the 4 panelists, and Ubaldo and Cueto were ranked quite a bit higher than Volstad. From what I've been reading, a lot of people expect a big year from Ubaldo. Stick with what you've got.
C-Mauer, 1B-Fielder, 2B-Kinsler, SS-Zobrist, 3B-M. Cabrera
OF-Beltran, Markakis, Crawford
UTIL/Bench-Vlad, Damon, J. Reyes
SP-Billingsley, Oswalt, King Felix, Shields, Wandy, Carpenter, Edwin Jackson, B. Webb
RP-Nathan, F. Francisco, B. Wilson, Street