I got HB 597ci HD DI Combo recently.
Happy with it so far, enjoyed the X-ray like down image when I switch from normal scan.
On board GPS is so good, I don't use my handheld gps anymore.
Plan to add the fishNchip this week.
On rare occasion , my HB will meter only 20+feet instead of 100+feet of actual depth , but after a while it will adjust back again.
Don't know if this is normal on other make/model....?
http://www.cabelas.com/product/Hummi...h-All+Products