G9 from logitech is supreme due to its ability to make macro buttons.

So in essence with this mouse, you can use SHIFT, ALT and CTRL keys.
Then you can also when having SHIFT+x bound on the button press CTRL on keyboard and then u have even more options.

In addition this mouse can store these key-combinations in the mouse memory, which means u dont need drivers to use it.

Awsome mouse. Takes some getting used to the feel of it though.

Bufe