I have recently found out that my 13 inch Dell inspiron (2007 model) is starting to slow down tremendously. I use a 3D modeling software almost daily and use a word processing called LaTeX as well. I am really thinking about buying the 13 inch MacBook pro, but I am hesitant because I am 2 years away from graduating high school and I don't want to have to upgrade in college... So my basic questions are: Should I upgrade? How long will the Mac last? Which is the best MacBook for the money? And If I do get one should I wait till early 2012 models?