I don't have any experience with Hummingbird, I have only ran Lowrance products and love them. I have had small units all the way up to the 110, 111, 112 and 113. I really enjoy the ease of using the Lowrance products as well as what they are able to show me in the water.
As far as the i-finder goes, I have never used one, nor do I think I will. I have GPS on my Lowrance so I can easily follow a trail if I need to. Also I NEVER keep my trolling motor on constant so that feature plus many others would be worthless to me. With trolling motors I like them as simple as possible, no universal sonar, no auto pilot as I have NEVER had a good experience with an AP..., I want my trolling motor to turn right, turn left and for the prop to spin..that's it.