MetaSRC, OP.GG, Champion.GG, PickBan, etc. Which do you consider to be the best and most dependable?

There are a lot of League of Legends "stats" sites out there that aggregate win rates, play rates, item builds, and what have you. The exact numbers vary wildly but you could say that the consensus among them is vaguely correct.

But which one do you personally prefer? Which one do you consider to be "gospel"?