Right now at the apple store a refurbished Macbook is $850. Is it finacially responsible to buy that when you can buy a HP Pavilion DV6-1230US 15.6″ Intel Core 2 Duo Laptop for $650?
Laying aside for a moment the question of hardware, what is the long-term costs of ownership? This article details one persons experience. Also you can find more details here. Also Enterprises Chucking Windows Choose Macintosh
As an IT consultant I have often seen the problems that Windows users have faced when they had a virus or driver issue from using their computer. Of course Mac users have issues too, but it is far less than Windows. As a computer repair person I use a Mac. Most of the time It just works.