do you realise that you're posting your question on a forum that dedicates itself to making windows based computers look like OSX? So obviously the answer will be GET A MACBOOK PRO GOD DAMN IT!!!
but seriously, I would also get a Macbook pro because:
1. Having had quite a few notebooks/laptops in the past, I realise that the support and services provided by Apple are by far the best. I've had Dell, Asus and Toshiba laptops.
2. The beauty, simplicity, sexiness, userfriendlyness, younameit... of OSX and its applications. I just wish that my company was using OSX based computers *sigh*
3. As you and others have pointed out, you can have both OSes running on a Mac, something impossible (well, legally) on a normal PC
4. Don't ever get a 17" laptop because your back will be blaming you!!!! 17" laptop just doesn't offer you the mobility, portability that a 15" or 13" laptop does!!!
Hope that helps and good luck