As a spurs fan I hate to say this but i used to think it would be Chelsea. Especially at the beginning of the season when they were on form. However now they are having a bad run it has opened up a little especially as Man U, Arsenal and Chelsea are all struggling. I am doubtful as to whether Liverpool will be able to sustain this streak, especially with Torres out for the whole season. So on balance i will say Man U, just because i think they have the strongest squad, they are always good over the long term.
Manchester United is always my fav team in premier league... Just think about Rio Ferdinand , Wayne Rooney , Giggs , Park , C.Ronaldo,Evra... They are the strongest team in their league... my second choice is Chelsea and third one is Liverpool...