so my iMac mouse (logitech mx revolution) is crapping out lately and I am planning on replacing it. for those of you using the magic mouse for a while now, what are your thoughts on it? is it worth the extra cost over a generic microsoft wireless mouse? keep in mind that the iMac is my secondary computer to a macbook pro. so basically, are there any problems with the magic mouse or is it finally a great mouse from apple? I know there are other threads on the magic mouse but im hoping for thoughts now that it has been out for awhile... thanks.