It depends. None of the teams have displayed consistently brilliant football yet, but when they click, probably United(brilliant forwards) and Chelsea(three midget geniuses). City should be able to play some wonderful stuff as well, but they have Mancini as manager.
If we replaced Gervinho with an able footballer, got Jack back into the team and brought in a top striker, we'd be in the mix as well. That's a pretty tall order from us though.