Matrix 37 for the trolling motor
I have and prefer my matrix 37 for the front of the trolling motor. It has a view that will give you the typical depthfinder view. With it displaying from right to left, but also gives you a view looking down. This is very helpful once you find a brushpile in determining which side it is. The 37 has a 90 degree cone the widest of all of them. So in return in you are in 20' of water you are looking at a 20' wide path of bottom desplay. This unit I believe sells for 299, I would also suggest buying the optional weathersense for measuring the barometer. I think at one time humminbird was giving you a coupon for a free one if you bought a matrix unit.
Ted
Neither snow nor rain nor heat nor gloom of night will keep me from crappie fishing!
2010 Lake of the Ozarks Super Slab Champion