on a new GPS unit. What would be your choice? I am having a hard time with all this. There are a lot of options. I have been leaning to a Dragonfly. It's going on a HB Guide CC that I mainly use inshore backwater. But will use some on a large deep lake up the road. So I do want some good bottom detail like chirp. And I go deep into the Glades about twice a year. So the GPS overlay is a big plus. No more sticking my head inside my shirt to see my stupid iPhone. What are you opinions?