It's impossible to not give a nod to Apple on this particular subject. They most certainly created the first mainstream, consumer-oriented graphical operating system, something that took Microsoft much longer to accomplish.
I've always been a fan of Logitech mice. They used to have great domestic tech support and long warranties on all their products. Now that everything is made in China for the lowest cost possible, their products aren't what they used to be, but they're still better than the competition. I've used a number of Microsoft-branded mice, and most of them have been quirky or otherwise annoying to use. Razer's products just don't last very long, so Logitech remains my choice.
I sure do wish they had better trackballs, though.