In my opinion, Macs in general have far superior hardware and the price reflects this also. For example, Macbooks have an enormous battery life compared to other laptops with similiar specs. As for the OS, it's really just a matter of personnal preference. I don't mind OSX but I prefer Windows, and since you're on Ubuntu right now I believe it might be even easier for you to switch to OSX.
I work on a mac but own an asus laptop running Windows 7 at home.