ive been looking at tablets, obviouly WACOM is the most popular. who here uses them, how are they for navigation around P.S. (and windows if you can)? i obviously already have a mouse, a nice one, better than the wacom ones, can you buy them without the mice? what kind/size do u guys have? how often do u use the buttons on your pad if urs has them? any other things i might want to consider?