Hi guys.... I would like to know your opinions... What would you buy if you have 2500 dollars cash??

PS: I like Apple Mac Book. It has great design. it's very fast (sturtup / shutdown). Today I was @ local Apple Store. I saw Mac Book Quadro Duo for 2299 Dollars... Subconsciously I want to buy it, but I heard much about incompatibility of Win7 files (e.g. .exe, .doc).with Apple. Please help me choose...