I absolutely detest computer mice. Personally, I think they are ergonomic disasters and are very uncomfortable to operate — the constant wrist motion of using a mouse always left me in pain after extended sessions.
So for as long as I can remember, I’ve been using Logitech’s excellent TrackMan Wheel.
I own about 10 of these between the various work and office computers I use. It turns out that Logitech now makes a wireless version of the TrackMan.
I’m definitely picking one of these up to replace the wireless mouse I’ve been carrying in my laptop bag, and will probably gradually replace my wired versions of the TrackMan with these wireless models.