Hart
Given is single handedly, all on his own, responsible for us losing possession 10+ times per game.
We must keep the ball better if we want to win things and we can't do that with a keeper who is hell bent on hoofing it all over the park at every opportunity. When was the last time you saw Cech or Vds hoof it all over the ground? They don't do it.
And I should also add, Given is rubbish at commanding his area and coming off his line. Brillant saver, yes. But half the time he shouldn't be having to make the save because he should have come and claimed the ball in the first place. And anyway Hart is just as brilliant a saver.
In his younger years Hart's flaw was he came for the ball too much and ended up flapping around a lot. Now he's matured and learned and has much better judgment. Hart is now just a better keeper than Given, period.