My 2000 Starcraft Aurora 2015 has issues with the speedometer and Lowrance 3500 depth finder. I'm thinking that a GPS combo might be better than repairing/replacing both. I won't use it for fishing.I would like to be able to follow a river channel, measure speed, & measure depth with an in hull transducer. A tracking feature would be nice also for following prior routes. I was told that I should be able to find something in the $350 range. I'm asking for recommendations. Thanks in advance.