Audidude: What would be really interesting would be feedback from someone who has had a K3 or K4 and who now has a Touch. The screens are apparently almost indistinguishable from each other and that person would be able to give us a good hands-on report on the comparison, and particularly on how they have found the Touch in terms of the quality of the screen implementation. There's plenty in the reviews online but a local geekzone report would be great.
I bought a K3 in 2010 and just bought another Kindle Touch during Xmas last year out of curiosity.
To be honest, cant see any difference between them
It really depends on whether you prefer touch screen or keyboard for typing