Talk to Brian at BBG marine and electronics. He was very helpful to me when I was wondering in electronics land. I gave a HB 788 HD DI on the bow I use for fishing over brush at Green and a HB 898 HD SI on the console. Both work very well in stained water. I use the Switchfire setting on top and DI on the bottom as a split screen deal while fishing over stuff.

Pappy is right, bigger the screen the better. The 2D Switchfire works really well.

You can Goggle them for their webpage. They had the best prices, too.

TG