I have the Garmin 545s (fishfinder and GPS in one) and love it. It has a high-res screen, and can take the new bluechart chips (I think that is what they are called). I haven't tried one yet, but I think it will automatically plot your course based on tide and depths with the chip.
Anyway, great unit, I think I paid $949 for everything including the transducer last year. Any questions, let me know.
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