I've been developing on a MBP for maybe 1.5 years now and it is so much better than Windows.  I still have no idea how to use the OSX UI really but you can do everything in their close-enough-to-Unix command line.  Between that and Homebrew I don't think I'd want to go back to a Windows platform.  Only downside is Windows has much more and much freer options for things like XML/XSLT and things of that nature.
			
			 
				
		 
 
		 
                                 
 
		 
                                 
 
		 
 
		 
                                 
 
		 
 
		 
                                