Do yourself a favor and spend the money for a color unit in sonar and GPS or combo. Personally I prefer separate GPS and sonar in case one goes bad.
Eagles are great for the money but I pref, probably the bester the backlighting of the Lowrance. Garmine makes a great GPS, probably the best, but their sonars don't impress me at all.
I wouldn't buy a Hummingbird if it was the only product on the market. Bad, expensive experience 15 yesr ago lost me as a customer forever. I'm sure not fair thinking on my part but they aren't the only game in town.