Corey Hart vs. Gabe Gross

How does everyone rate these two players?  With the possibility of Carlos Lee not being with the Brewers the entire season one of these two may have a good shot at a significant amount of AB's after the All-Star break.  But which is more likely to break into the everyday line-up should Carlos Lee be traded?  Also, does anyone know how each of these two hitters have split against LHP and RHP in the minors?
What are the Brewers' other options should Lee be sent away in a trade?  Koskie in left field?