Realistically speaking, if I had created this poll now instead of approximately some 10 weeks back, my first choice would have been the 5th round going down as I don't know of any team in their right mind who'd trade a higher pick - not even factoring in that albatross of a salary the BeanCounter gifted him - unless an inducement like Cromartie or Mangold were part of the package.
I maybe could an egomaniac like Pete Carroll going ahead and trading Matt Flynn and something like a 4th rounder for Sanchez and Mangold thinking he can show off by again fixing The Buttfumbler and turning him into a decent clipboard holder.