I need some input here. I just bought a Hummingbird 398 SI CI last year. My transducer got hung on line from what appeared to be a jug line on Tawakoni on Sunday and broke it off. I am thinking of getting a whole new unit. What is the best for your buck as far as Lowrance and Hummingbird. I would like to stay in the 300-500 range on price. I am really wanting the bigger screen as well. Any ideas or suggestions?