I never use the mouse, always the Wacom (A5 size), for any APP including Poser.
I bought one indeed for Carpal Tunnel and for Photoshop.

I have the tablet on one side of my keyboard and a 3D mouse on the other side.  Camera motion is too sharp on the pen (hence the 3D mouse), but dragging objects etc. is much faster with a pen than with a mouse.
Wacom and 3DConnexion: the winning team for me.