There are pros and cons to each manufacturer's product especially in the installation. I went with the cannon last season and have no complaints to date. Installation was straight forward. If you go with this unit be cautious of the length of coax cable supplied and the position you want the screen. I installed in a 20' CC and the cable barely made it from the rear rigger to the dash. It was too short to make it up to the radio box. http://www.boaterbarn.com/cannon_intelli_troll_speed_and_54813_prd1.htm
Be sure to check Proctor's price for any make as their service and installations are very good.
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