If you like the feel of the mac OS and don’t use any programs that require Windows I honestly see no reason to not get a mac.
It’s faster, more stable and a lot more intuitive for almost anything in my mind. And this from a guy who hates his mac.
I stick with my windows because I use a ton of applications that are windows only, I don’t like finder nor pathfinder on the mac OS and I don’t like photoshop on mac.
All huge factors for me.
And now Unity comes to windows so the circle is complete. My mac can mingle with the dust bunnies under my bed.
I wouldn’t buy it due to the crappy display quality. There are worlds between the display from the MacBookPro and the MacBook, especially if you want to use it with likely changing light situations. If you need/want Apple then the Pro otherwise a Sony, most probably also the cheaper option.
OS X is a superior operating system to Windows Vista (I work on both systems). But there are software reasons why I still have to use a PC.
3D Studio Max is only available for the PC and thats what im skilled at using. If your starting afresh then there are plenty of OS X alternatives like Maya, Modo, Cinema 4D.
I agree with Twiik on PhotoShop. For some reason the Mac version has a transparent background whereas the PC has a solid one. This alone bugs me enough to avoid it.
But there are things that come with a mac that are fantastic. iMovie is brilliant if your into camcorders. GarageBand teaches you how to play instruments, OS X software in general feels of a much higher quality than PC software, why? no idea.
iTunes and iPhoto just work flawlessly whereas on the PC iTunes trashed our vista install.
Time Machine backups are a life saver. Time machine works really well and to fly back in time through your files in 3D space is quite a cool feature.
And finally, If you get an Intel Mac then you can run BootCamp and install a windows flavour like Vista 64bit.
All of my development is done on a 1280x800 resolution display. It takes a little bit to get used to, but now I am at the point where I would rather sit on the couch with my laptop as opposed to going to the desktop with 20" display.