I am looking to upgrade my very old depth finder to something with more then 10x10 pixel's and 100 watt's peak-to-peak (ptp), lol. Looking at the Eagle and the humminbird in the store, the Eagle seems to have a much more clear image with the simulation, and the HB even had a better pixel ratio. I also believe the HB seems to have a more user friendly interface at first, but feel that the Eagle will be fine after some time with the manual. The major difference comes into play with the power and transducer freq. The HB 565 has a dual beam (200kHz and 83kHz) and 2000W ptp power. The Eagle 320 or 480, both have single 200kHz beam and 1500W ptp. Questions are: a) for fresh water fishing, max depth less then 150ft, with 50ft or less typical fishing depth, is the 83kHz beam needed? It should give a wider response, but less bottom detail if I understand correctly. b) The Eagle has 25% less power, will this be very noticeable at the depth's I fish, or will it really show up at deeper depths? The higher power should give better detail, but at 50ft or less, will there be much difference? c)The screen on the HB models seem more cartoonish and less exact, features and fish seem to blend into eachother much more then the Eagle or lowrance. The Eagle is much more crisp and disticnct. Is this just the simulator mode, and are they more similar in a real situation on the water? d) Lastly, would you perfer a smaller screen (3.5in) in color, with some drop in power, or a larger 5in screen in black and white? Everything comes down to keeping this in my price range.