check with your school
they will tell you what you need for minimum specs etc. and if it needs to be mac or pc for the programs you will use
also, many schools have discounts. You like punch in you student id at the company's education website and you get a good deal and it sometimes comes bundled with your software
worst thing would be getting an expensive computer and finding out that its incompatible
other than that, macs are much more reliable and resourceful (use less power to get stuff done), and they have ridiculously long battery lifes - just things to consider with the hight price