I agree with the thought that a common mouse (no matter how tweaked it might be) is antique in many respects. In 96 I bought my first Kensington Trackball & it was an eye opener. Never found anything as good. Through 4-5 models, it is the finest pointing device I've used.
Many people don't like and can't adjust to the "Eightball Sized" feel, so I understand why it's not
liked, but my hand and fingers are in a single static position and I can adjust speed and feel well
beyond any mouse. Most important, I don't use my arm. Only fingers.
A pen still requires more movement. Just An Opinion