Lazer mouse, I think I been spoilt by my PC wich I have logitech Darkfeild mouse that can even track on glass and is ultra sensitive and tracks perfectly, going back to my real Amiga recently was a bit of a pain because I haven't got USB ports for it and so still using the old track ball, and boy it did feel bad. I was considering getting a ps/2 connector for it but it quite a bit of money for something I dont use as much as I use to.