Looking for some technical recommendations. Background: I have a pontoon (24 ft) at our cottage on a small 150 acre lake in Mid Michigan. The pontoon has always had a "Fish Finder" on it...that basically tells me water depth only (It is old and fairly worthless). I'm thinking about upgrading to get "smarter" when fishing the lake. I really don't know much about fish finder electronics or how to use them (yet). Any good recommendations for a pontoon? Lake max depth is 30ft. Typical species (Bass, Gills, Pike, Perch, occasional eye). Probably in the $200-300 range is where I'm looking. TIA!