[lacky]

I own and have used choice 2, 3, and 4.

3(the gyroscopic mouse) sucks for poker. The amount of arm movement needed will make any problem you have worse.

4 (the cheap logitech trackball) is functional, and I use it for my left hand sometimes when playing mtt's to give my right a break. it's worth the $15 just to have it around for that or for a backup.

2 (logitech optical wireless trackman) is what I've used for 2 years. It's the nuts, and it's not even close. The setup is as follows. lazyboy recliner partailly reclined, feet up. Pillow sitting in lap, trackball and keyboard on pillow. arm rests on pillow, hand rests on trackball.

With that setup you play with everything relaxed and only your fingers moving.

Steve