Well we purchased an older pontoon to be able to take my little girl out more. It has a basic depth finder on it but I was wondering if you guys could recommend something cheap for it. We will use it trolling and jugging with occasional uses of fishing around docks. Kids come with high price tags so I would like to stay around the 400 dollar mark. I have seen quite a few garmin and g2 helix on cabelas that I are close to that price range. I prefer to goto bass pro or cabelas bc I received gift cards over the last two holidays and I figured I would apply those towards the purchase. Thanks in advance.

Pro and cons of each you guys recommend would be awesome.