If you are considering an eReader which will work with your Jepp plates, and is apparently easy to update, then you might want to look at the SolidFX FX10 portable electronic chart reader, which uses specialised software to display Jepp e plates.
It is based on the iRex DR1000S digital reader, and has pretty well all the same capabilities, as the other readers. It is slightly bigger, and is quite expensive
compared to the other models already mentioned. Presumably, the additional cost is for the specialised software added to handle the Jepp e plates.