You cannot go wrong with Logitech. I have not tried the Magic Mouse, but I have tried the Mighty Mouse and it was so frustrating (could not temper the speed of the mouse movement, scroll speed, etc. without using a third party program).
Now I regularly use 2 different mice, both from Logitech and I need to adjust nothing. They work plug and play. IMO Apple is great at making computers, iphones, ipads etc. but not so much with the mice. Logitech has it down.
But again, I have not tried the Magic Mouse so it may have improved over the Mighty Mouse. I would test drive them if possible to decide.