The best thing to do is educate yourself on what Down imaging, side imaging, create your own maps, CHIRP, 2d sonar, and so much more can do and if and how they fit your needs. Then educate yourself on Lowrance, Humminbird, and don’t forget Garmin. The more YOU learn the better of a decision you’ll make and the happier you’ll be. I could spend your $1000 in a second and you won’t have a clue what you have. So educate yourself so you can spend your money.
I hope this helps.