The Logitech G500s gets five-stars without even breaking a sweat. It's good for all tasks and has a powerful gaming sensor. That said, it might be better for professionals (graphic designers and the like) than gamers, as the overly subtle scroll wheel steps make some actions difficult, as do the three tightly spaced thumb buttons.
Best of the rest
Experts and Pros
Razer Naga Epic
As well as being a fast, precise mouse, the Razer Naga Epic is comfortable to use, offers good glide and has loads of buttons on its thumb-pad. It also comes with a comprehensive driver.
The Kana is an excellent mouse for both left- and right-handed users. It has a nice design and a customisable thumb-button on either side.
Logitech Corded Mouse M500
This is a decent-quality and comfortable mouse that's great value for money. It's principally designed for office computing.