Looking for the latest and greatest electronics for the front of my new to me Ranger. Previous owner did not have a unit mounted. Know nothing about hummingbird as I have 2 Lowrance units on my other boat which I can't work either so figured I would give Hummingbird a try on this one.

I need a unit that has structure scan and down and side imaging with a screen big enough for old eyes to be able to see. What do you recommend?