I have an Apple Mighty Mouse that I bought years ago. It's starting to become annoyingly unresponsive for reasons I can't fathom. If I must go with a new mouse, any that you find compelling for Logos 4 (MAC or WIN). Since a decent mouse is not cheap I don't necessarily feel like I would buy an Apple mouse. Some of the Logitech and even MS ones are supposed to be very good and they are MAC compatible. What say ye?