Jared Meyer
Veteran
What I hate about almost all mice I've tried is how hard it is to scroll - you have to apply too much pressure, the wheels almost always have this obnoxious stepping action, instead of being smooth like butter.
You might like the Logitech MX Revolution....I just figured out today that there are two scrolling modes- you switch by pressing down on the scroll wheel. One has the usual clicking stepping action as you describe and the other is completely free-gliding butter smooth. You can flick it and it keeps spinning for a good long time - more than 30 seconds. This takes you from the top of a long document to the bottom very quickly.
The scroll action is instantly responsive in both modes as far as I can tell so far. As soon as I move the scroll at all, I see the result on the screen.