Realistically, what should be expected from Valencia at this point? Looking at Baseball Reference, there are some interesting comparable players through their age 26 season (so, through 2011 for Valencia, not including what he's done this season).
Of course his career could be totally different from any of these guys, but it seems like his ceiling is probably a guy like Aaron Boone, but more likely he'll be like a less powerful Leo Gomez or a more powerful Tom Brookens.
If he has the potential to play as well as Boone (a little better than replacement level), do you keep him?