Questions to ask yourself:
1. Where will I be reading this the most: a) inside, normal living-room sort of lighting b) outside, brightly-lit environment, or mix of indoor and outdoor.
2. Do I care about reading magazines and newspapers on the nook. a) yes, b) no.
3. Do I need to entertain children with various graphics and pictures. a) yes b) no
4) Are finances a consideration at all. a) no b) yes.
If you answered with more "a" responses, then get one of the Color versions. If more "b," then get the Simple Touch.