Brady may be on the cusp of leaving his prime, but he still gives the Pats their best chance to win, and probably will for the next 4 to 6 years. I can't think of a deal I'd do if I were the Pats.
I guess Manning + Freeney, or Rodgers + Matthews, or maybe even Schaub + Williams would get my attention. However, barring a deal for a Pro Bowl QB and an All Pro defensive player (deals that won't be realistically offered), this is a non-starter.