My first thought is that you have quite a team, but could use an elite closer. I'm sure you know that Otsuka and Torres' job security is shaky at best. I would try moving one (or both) of them, plus Mussina, Pettite, Cabrera, Shields (just keep going up the list until someone bites) for something along the likes of Papelbon, Nathan, Wagner, etc. Also, I don't know how you feel about Brett Myers, but I was patient enough to hang onto him, and I am VERY happy with the results. No way Gordon gets his job back now, IMO. He definitely has the skills to be the next Papelbon, and you may be able to get him for much less. Just something to consider.
In addition - and you might not feel that what I'm about to suggest is ethical - you can try this strategy: if you don't know most of the others in your league already, try bullshitting with them (email, league board, etc.) and figure out who their favorite teams are. This has been a tremendous advantage in trades for me thus far, since I've found that most people are willing to overpay for one of "their guys". Chances are you have some of these on your roster.
I think the consensus on my latest dilemma has already been reached, but feel free to chip in if you want.