Now that I finally have purchased my first boat, what is the best fish/depth finder for use in a 16' aluminum boat? The majority of the time this boat will be on the river, with a little lake mixed in. What would be the best finder for: A. Price - like to keep it as low as possible of course, under $200 if possible B. GPS - not really necessary C. Water temp, and fish ID are a must D. Are there depth/fish finders that will locate cats on the bottom? Thanks for any suggestions, I know this is the place to get the info to make my decision!