Mac all the way, I'm afraid.
Which means yer gonna spend a truckload more money.
The term you were asking about is called "graphic design".
I spend an equal amount of time doing this on both PCs and Macs. Both have the same software, and it works exactly the same on both platforms.
Problem with the PCs is the finished product. I don't know what the deal is with PCs, but you just cannot trust that what you're seeing on the screen is what is finally going to be printed. It's probably the variety of graphics cards. Macs are pretty much standard, and the presses are quite geared to calibrating their stuff to them.
It's a crap-shoot with PCs.
When it comes to video... All the guys I know who work in film work on Macs. I dunno video, so I dunno why.
When it comes to sound, the gold standard (afaic) is ProTools. I used this stuff for a bunch of years on a Mac, then a bunch of years on a PC. Mac simply kicks the PC's arse in this department.
The biggest problem with a Mac is basically the limit to your software choices when it comes to things outside graphics, video and sound. And for a personal computer while yer going to school, that's a huge consideration.
If I were in your shoes, I'd get a PC. Cheaper and relatively close. If you need any of this stuff on a professional level once you graduate and can afford it, go Mac.
But keep a PC at home...
