I just bought a Terrova TM with the integrated transducer. Now I need a fishfinder. I don't want/need /can afford an expensive Humminbird that Minn-Kota wants you to buy with the Terrova. Here is what I desire: - 2D only, so it is compatible with the 83/200 MK integrated transducer - Color screen {preferably 5"} - Easy, intuitive instructions - Price: say $250- $400 From Minn-Kota's compatibility list, I've found the Garmin Echo 550c {discontinued} or Garmin Echo 551c {new release and I must Call MK to see if they've added it to the list} Any opinions ? .