You're just and old fart.
Seriously though; I haven't tried any of the 3D mice(although I really want to, but they're a bit expensive to pick up just to try), but from what I've seen I don't think they'll be better than a trackball outside of the applications the 3D mice are designed for.
I would say either get a regular trackball and/or a more comfortable mouse, and get used to higher dpi to keep mousing work down.