I'm looking for some advice regarding getting a trackball. I've been using a Logitech Performance Mouse MX for about 1.5 years, but am experiencing elbow and forearm pain in my right arm. I've tried a Vertical Mouse (can't move it finely enough), Trackman Marble (ball feels too small and not enough dpi) and a RollerMouse Re:d (got on well with it, but can't justify the cost).
I love the Performance Mouse MX. It really allows me to move around 2 high res monitors (2560x1440 & 1900x1200) very quickly and accurately. I love using the scroll wheel, too.
I'm thinking about getting one of the following:
Expert Mouse
CST 2545 - 5W (Worried about the placement of the scroll bar)
Microsoft Trackball Explorer
I'm a programmer, and spend a lot of time in Visual Studio and browsers.
Which Trackball would you choose?
Many thanks for any advice.