I need to replace the fish finder on a used rig I recently purchased and I'm totally confused by the vast array of options out there. The last one I used was a portable HB Super 60 and that was a life time ago. I am looking for something simple that I can understand since I'm not very technologically savvy. I mainly fish in fresh water for bream and crappie and the occasional unlucky largemouth. Any recommendations would be helpful. I'm close to a Gander Mountain store and 2 hours from Bass Pro and I've tried to talk to the folks there and either I'm really dumb or they are. Thanks.