Quote:
Originally Posted by ephemera
i guess the only way to be sure is to try it out.
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That really is the right answer.
This is an area where people have strong preferences, and their history has a lot to do with it. Personally I don't like either trackballs or touch pads; my wife *loves* touch pads. I'm OK with a mouse, but the best input device I used was a graphics input tablet. I liked the adjustable resolution, and that the motion was not relative, like it is with a mouse. That is, you can't pick up the puck and put it somewhere else without the cursor moving. The tablet center is your screen center, no ifs, ands or buts.
Other than that, I'd suggest you go to a bricks and mortar store and try a few for comfort and features. You might be surprised at the shear number of them with different form factors (if the store is any good).