Before deciding betwen a PC or Mac, I think it would be a good idea to do some homework and check to see what operating system and software they'll be using at your college or course. It could indeed be primarily Apple's OSX, but not necessarily so. No harm in double-checking.
If PCs are a compatible option for your course and software, be advised that often they are the less expensive choice, with a wider range of hardware configurations and sizes to choose from.
Either way, you'll likely want to have a large screen with a high resolution, and a capable dedicated graphics chip. These will be essential in any laptop you choose. Also be aware of issues such as portability and battery life.
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