I have a Logitech MX510 Optical Mouse as well. Very nice mouse it is, seems like it's moulded for your hand. Looks good too. It has 7 buttons and one wheel. Only problem with it is that crap off your hands tends too stick to it, so if i'm going to use the computer, i wash my hands first. And if my little bro touches it with his grubby mitts, i smack him in the face.