Build a Hackintosh! Or just buy a Mac Pro/Macbook Pro (depending on your needs)
Mac is the industry standard. You can still do pretty much everything on a PC, but it really just depends which OS you like more. In my opinion, some extra my for a better machine, especially with the retina displays they have now, is well worth it! Then again, if you love Windows, you can keep using it and still do fairly well.