Should I switch from PC to Mac?

Right now I have a Dell laptop and its outdated so im getting a new laptop. There is a computer sale going on and they have a 2 month old Acer Aspire 7736z and a 2008 Macbook. The Macbook is only $75 more than the Acer. I can afford both. I like the Acer because it has a 17 inch screen but it doesn't have a great graphics card to play games and you cant change it. So which should I get? Please list some pros and cons.