I'm having some carpel tunnel syndrome or RSI issues, and I need to get a new mouse.

I've tried a friend's Logitech MX Revolution and it's almost perfect. I LOVE the thumb-operated scroll wheel, and I think that that alone would solve many of my hand pain issues.

The problem is that it uses their newfangled smooth/click scroll wheel. It can be either smooth or clicky, and is switched by pressing in the scroll wheel.

I really question Logitech's user research on that one. I've been using middle-click to open new links and close tabs for years now in my browser, and I'm not willing to give that up for this cool technology. In fact I HATE smooth scroll wheels in general, and need a clicky one. The option would be ok, but not if it's activated via the middle-click button.

In closing, I'm looking for these items in my mouse:

• Thumb-operated scroll wheel or 'joystick'-like apparatus.
• Clicky, as-stiff-as-possible scroll wheel on top
• Normal middle-click functionality.
• Comfortable, preferably ergonomic design.

Anyone have any suggestions? Logitech, want to get rid of that smoothing-scrolling crap so I can buy your mouse?