personally I like the wireless MarbleMan+ thumb/trackball for a mouse.
I think that there is a starter version Intuos tablet for $99.00 which is
not that much of an investment depending on how much graphics you do or
plan to do in the future? I think they might be found at a lower price with
some web searching? not sure though...
Fuzzy pointed out the one hang up I have with my MS wireless OptiMouse. When you
move to fast the cursor has to play catch up and it is not always true tracking
so you end up having to use Undo and then do it again. Though it might just be mine
doing that, not sure on that either...?

good luck with you eventual choice
oh, some of the Commercial Magazines have Online edition and they do reviews, you might
also want to look around for some of those before a final choice?