Good points on both accounts. Something in me still says that Buehrle's available depsite the contract extension (the White Sox didn't want to give him a no-trade clause and an extension was the first step towards a deal). If Buehrle is truly unavailable, then I agree with you in that Schilling is probably the best realistic option we have.
Now that I think about it, you're probably right about the 4th OF being the highest priority. Hinske is a nice lefty with some pop in the bat to have off the bench, but he's probably a 5th OF for us. WMP needs to start if he's going to be effective consistently. Considering that he won't get enough at bats here to be that contributer, he's gotta go. He'll be a tremendous contributing power bat for a team some day, but not for us. Any ideas on who the 4th OF could be?