Liverpool are certainly a tough team, the only one with full points.
Chelsea also have a good chance in my opinion.
Arsenal have potential but are unlucky and easily discouraged in my opinion.
I honestly see Manchester City out of the title race.
I don't think Manchester City are completely out of the Premier League title race this season.
It's true that their performance was very poor at the start of the season, but that doesn't mean they can't fully recover from their poor form... they simply lost their early momentum, but they still have a chance to challenge for the Premier League title this season.
They've been like this before, but they still managed to win the Premier League title, and maybe they can do it again, who knows.