I fish in water less than 20'.My question is : will it make any difference. Garmin DI , Lowrance DI. or Humminbird Helix 7 DI. I am sure some of the higher priced units would be better. I already have a Lowrance Elite 7 hdi, I am looking for another unit for the bow. How important is side scan?Are these units inferior to a more expensive unit? Will a Garmin be sufficient in shallow water using a CV transducer? Is the Lowrance DI a poor choice? A lot of questions , but I know the knowledge is on this board and everyone is always ready to freely make comments. ......thanks for your comments....crappie1133