There is absolutely nothing wrong with pcs or macs these days.
A pc will give you better specs for your money, a mac will give you (arguably) a more solid operation system, some pretty good pre-installed software, and a really cool looking computer.
If you're looking to buy a laptop I'd have a mac everytime. For a desktop I'd be more tempted by a pc (despite owning a mac pro, which is awesome but I'm still paying for it!), although the imacs are lovely.
Ultimately, it looks as if any computer will be powerful enough for your needs, it just comes down to whether you want windows or osx. And of course, all macs can run windows as well as osx, so you'd be completely covered in compatibility terms with a mac.