I noticed on Apple's site that the low end 15" MBP (2.53) only has a 60W MagSafe while the other 15" MBPs have an 85w MagSafe. Is this solely because of the additional graphics chip? I assumed they would all have the same battery and would all share the same charger. Has anyone opened a 15" MBP 2.53 up yet? I would be curious to see how much it differs internally from the other models (if at all). I assume it would still have the 2 fan design, even though the 13" has the same specs and runs with one fan. Thanks for any insight.