I want to be able to click, scroll, right click, and move using the D-Pad, all simultaneously. In my search for this elusive piece of hardware, I've come across one mouse that had an actual D-Pad on it, however, it replaced the scroll-wheel and that won't work for me.
Refer to a video game console controller, the D-Pads are under thumb, allowing you to pull triggers and push buttons with your other fingers. This is basically what I want to be able to do with my mouse.