Your team is strong in every area except the OF. Hafner is the real deal, trade Kornerko and Giambi for some OF help. You can move Texieira if you like, but make sure you're getting a super star in return. One trade comes to my mind is Kornerko(or Giambi) for Blalock, you can then plug MCab in OF.
You have no speed at all besides Sizemore.
Can't do much better than the Johan-Oswalt one two punch.
Don't worry about saves, even with the three you have you can finish the catergory in the middle of the pack. Just make sure you keep an eye on the WW for closers.
Definately trade one of your 1st basemen for OF/Speed whatever you want. Just make sure you're getting fair value for them.
Your team is stacked. Your offense is full of power and you have 4 power hitting 1B. Speed is lacking. SP is excellent. All of those guys will be slid and you can't do much better than Santana and Oswalt at the top. Your RP shoud be good. I'd keep an eye on Foulke and see what his status is like, but if healthy, you should be near the top in Saves. Your bench is excellent. I really like Hafner, Giambi, Garland, Lowry and Bonderman there. I wouldn't go for any of those FA that you have listed. However, you definitely need to shop a 1B for some speed. For any of those guys you should be able to pull in at least a Figgins/Podsednik type guy. You could probably get more if they are starving for a power 1B. I don't know how you managed to get Tex and Santana as both have gone in the 1st in every draft I've seen, but good work.