Buy a mac now or later?

[rocknroll86]

I just bought pro tools mp 9 +mobilepre and am anxious to get rolling should i buy now during macbooks clearance sale or should i wait for apples new stock.
Was considering the 13" macbook pro with i7, possibly a 15" with some better specs. Will these laptops have the power to handle the job or what should i do just want to build a basic studio without paying more than what these computers are worth, was also considering building a pc with purchased windows 7 but am worried about coding/legit issues?
Thanks.