Looking to purchase a fishfinder for the front of my boat (trolling motor) I look online in books everywhere but seems the more I look at the more confused I get. Looking to spend between 500-600 I see things like down scan,side imaging but I was wondering do they work with a trolling motor transducer. Would like to update the one that I have on the driving consaul but will have to wait till next year. Any help and ideas would be appricated