I don't think bookie prices are more relevant, because a bookie price can be severely influenced by weight of money (i.e. opinion) even if that money/opinion is severely misguided. A bookie needs to balance outgoings with the price, so it becomes slightly divorced from reality should someone decide they want to lump daft money on something silly.
I think Arsenal, City and Liverpool are all about joint myself, perhaps City and Arsenal slight favs, but that's just a gut feeling. I'm a bit surprised that model has us 2/5 favs this early in proceedings.