The Logitech G600 boasts of 20 programmable buttons, among them include a dozen thumb buttons, which are set in two groups of six on a meticulously designed thumb panel, delivering an easy reach for quick and easy access as well as speeding up the game play process. There are three default profiles to play around with, two of them reserved for MMOs while the other is for general gaming, and can run right out of the box without the need to install any drivers. It retails for $79.99 a pop if you are interested. I would say get the black colored version instead of the white one – if you are going to do so much clicking on it, dirt will accumulate extremely fast, and with the black shade, it would be harder to see (and hence reducing the need to clean and maintain it visually).
Good luck remembering just which thumb button triggers off an assigned action! [Press Release]