My Astak is old, but still my Fav for reading as it is light and the jog wheel is right where I want it to be able to read 1 handed.
The K4 has a great screen, but the turn buttons just don't make it unless I add a cover (and all that weight)
The Tablet has a Back light, while great for Color, the
weight is also tiring to hold up and battery life is
