Rick,
Thanks for the map info and SI screen shots. I was skeptical of real world use but your SI images look as good as Humminbird stock images.
The 798CI SI, their entry level SI unit, can be had for about $900 but I am concerned the 5" screen is too small for SI viewing. The larger screen prices are hard for me to justify.
My choices are 5" screen with DI (down imaging), the 597CI DI combo, or a larger screen unit with SI. You just made my decision harder! LOL
Thanks,
Jerry