Repetitive stress

I am in the Accessibility lab at work playing around with different mice and keyboards. I have already tried the Goldtouch split keyboard and now I am using the Evoluent Vertical Mouse 2 and the Kinesis Maxim split keyboard. It's odd. I wonder if it's any better than what I am using now. It can be raised or flat, but its main feature is that the two sides can separate a variable amount and it is not as wide as a normal keyboard because the 10-key pad is a separate unit. That means that you can get your mouse closer to the keyboard, putting your shoulder in a more natural position. I think I'm gonna get one of these for my office because of the shoulder thing. Even though the Kinesis is less customizable than the Goldtouch, it has a built-in wrist rest and I think I need that to keep me from tweaking my wrists. The vertical mouse is interesting but I don't know if I would like it for ongoing use. It's so hard to tell these things with only a few minutes exposure. For me it is anyway. When I use the vertical mouse I keep tweaking my wrist when I click, which makes my pointing really inaccurate. It's hard to know whether that's just because it is new or not. So indecisive this girl is! I'm, leaning toward not getting it since I fear it will just cause the pinky-side of my hand to cramp up like the 3M "joystick" mouse did. My hand isn't a fan of me wresting it on its side apparently. Mostly I am just dying to get my new voice recognition software installed - Dragon Naturally Speaking here I come!