The laptop I have is a 2GHz Core2Duo Intel MacBook, probably as powerful as the mid range PC's of the moment but slowest of the current MacBooks. It does run NX very well perhaps 50% of the speed of the Macpro. The keyboard is a new design with flat tile-like keys, probably designed not to trap any dust or debris in between the keys and is easilly cleaned.
I use a mighty mouse (Apples latest mouse) with a scroll button that allows scrolling around an active window which works in NX.
Previously using a PC I would have to choose the 'grab/hand' tool to move around a 100% view photograph, using a Mac with a mighty mouse I simply move around with the scroll button leaving NX with the cursor.
The mighty mouse can be used on a PC see link ->
http://www.apple.com/mightymouse/gallery/wired_480.html