Far to early to say really isnt it, this early I would still say Man u, having just brought in Berbatov makes that a quite amazing combination attacking(tevez, Rooney, Ronaldo and Berbatov!). Never count out Arsenal too and obviously Chelsea will be up their. I think Liverpool might struggle this season, and with Villa, Everton, Spurs and Man City all making some great summer signing then it might not end up the "usual 4" thats expected this season.
P.S. Im a Celtic fan, but I do love to watch the premiership, I know you all have your thoughts on the Scottish premier league, but you all gotta remember the money that your teams are getting to buy players, Sky Sports pay MILLIONS per season to each club, plus all other sponsorships, Celtic and rangers used to be able to compete with the the big English clubs in terms of cash but not now, we'll rely more on bringing through youngsters and a couple of decent foreigners and try and have a crack at a decent European run.