For those of you with cats, you will be happy to know that the bevel design around the screen is not conducive to capturing cat hair!!! On the K3 the bevel seems to be glued to the area around the screen. This often results in cat hair getting stuck at the sides of the screen and it is difficult at times to dislodge the cat hairs. The K4 design looks more like the Sony x50 readers, but not as deeply recessed--maybe half as recessed. The beveled edge of the bezel around the screen is dark black which is good IMO.