The Epson P-5000 is both a forward leap in terms of functionality and speed, and perhaps a backwards step for some photographers in terms of the overall design. The P-5000 is much quicker than the older P-4000 model. The transfer speed from memory card to the P-5000 is twice as quick, helping to ensure that you can achieve over 25 x 1Gb transfers before the battery runs out. Many photographers will probably want to upgrade on the strength of this single improvement alone.