I don't think Beltre is an option anymore at this point IMO. Like it's been said, the Sox are nearing the luxury tax threshold. And probably aren't going to spend any more big $ until some contracts are shed. Don't forget, Beckett and Martinez need to extended, so honestly I'm not sure the Sox can spend a ton going forward.
It's going to be Youk/Martinez/Lowell rotation ,or Youk/Martinez/Ramirez. I don't expect any large moves until the TDL at the earliest, unless Agon's price comes down, which there is no reason to think it will.