Rick, the Down Imaging feature was a software release on Jan, 12, 2010 which was after the web site specs were posted. Units mfg after that date had the DI already installed. If you get an earlier mfg model without DI, it is just a simple, free, install of the latest software to get it. The lastest software release in June fixed a shallow water digital reading issue and has the DI included.
Basically you can have an up-to-date model no matter when it was mfg.