I have been trying to find reviews on gps unit fish finders, I am presently looking at humminbird or garmin, anyone who has an info or review of units please let me know, I want to know how well they work, and the finer points, as I am looking to purchase a new one in the next month, and of course the salesman will tell you anything, many of them dont even have one. So Idecided to come to the people who really use them,