Having bought the 2010 15" macbook pro in the last 14 days, is it worthwhile to return it to the apple store and buy the new baseline 15"? I'm uncertain how significant the changes in the newer models are, will the 2.0ghz i7 quad core be noticeably faster than my current 2.4ghz i5 cpu and is the 6490m better or worse compared to my current 320m? I've heard I might also have to pay a 10% restocking fee which also leaves me doubtful whether I should return it or not. Any advice would be extremely helpful, thank you (sorry if this is posted in the wrong section).