Normally I'd say Ike in a heartbeat. However, in this case, you've got no room for either player with a rock solid 1B and Util player. Hosmer still has that small flicker of hope that he could emerge and become a star and he will play a little OF in interleague play and qualify. Ike's only value is if either Votto or Fielder get hurt.
i would actually take hosmer. i think this is the season he finally figures it out .282/25/90 is my prediction. He can steal and wont kill your batting average. if his bat gets hot I'm thinking he gets moved ahead of salvador perez to hit 5th in the lineup