Erndog-

Go get a Garmin 240 Blue. They have come down in price recently and are great finders once you get them dialed in. Super easy menu's to navigate. Self-installation isn't that tough, and they have water speed, temp, depth. I checked them all out for a couple weeks before I purchased and it was the best deal. Decent warranty too.
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You know something bad is going to happen when you hear..."Hey, hold my beer and watch this"