Logitech wireless optical mouse. I've never had any problems with the wireless function. The optical sensors do throw the occasional fit over the reflectivity (or specular quality) of the surface I use it on.
There are gyro/inertial mice out now. I've never used one. I understand there are some operational issues. One can't lift the mouse to reposition it, as mouse movements do no depend on a surface. But they'd be interesting to try.