I should say this, if you are getting a compute for normal computiing uses, macs are fine. Overpriced with worse performance but fine because you wouldn't notice anything.
However if you need something fast with good graphics, or if price is an issue because your parents aren't loaded, get a PC because you will get more bang for your buck. You can also use way more programs, play games, and do anything that a mac can do.
Remember that with a mac, you are essentially giving all your money to apple. You need to buy their programs, their accessories, their parts and service, in general, with a mac you spend a lot more. Also, a lot of programs for classes are PC only. Macs also break fairly easily, considering my moms emac has had horrible problems, even after apple replaced half the damn computer and my friends mac broke very easily.
I guess if you want to be the hipster sitting in the starbucks drinking your latte while checking your blog to see what your favorite indie record label is up to, then a mac is for you.
If you actually want to use your computer for something other then the most basic computing uses get a PC.
In the end, its your (well your parents) money and if they wanna spend a lot for a little then its all up to you.