Hey, I'm looking to get a fish finder. I'd like to know what I should look for when buying one. I sort of hoped that $150 to $300 would be my price range, but I got those numbers out of a hat and don't know if they're reasonable. Sure, I can find one that price but want one that will last a long time and be useful. For features, I want a good sized screen, GPS, quality view of the bottom and of any structures (e.g. trees, branches, etc.), etc. When I looked at them at Bass Pro Shop, it seems liked to get color screen, I have to pay $150 more, maybe more. Also, does output power matter? I saw a Hummingbird 365i, which has a 4" diagonal screen (I think this is maybe too small?). It has 2400 PTP power and DualBeam sonar, whatever that means. Any suggestions on what specifications really matter including any specific model recommendations would be appreciated. Also, does color provide me anything except better to see in daylight and cool?