Here’s my 2 cents. I went slightly shorter than the middle of the road with a Lawrance X47. It works great for depth, temp, and structure. However, when I upgrade (soon) I need to spend the extra money to get an actual fish finder vrs. a depth finder. Of course this one marks fish but I don’t trust it at all. With the amount of fish that this one shows down there, I don’t think there would be enough oxygen in the lake for all of these things to survive. And…. I drop the UW camera down there, it looks like the bottom of a pool but you guessed it!! Locater is showing fish everywhere..
It depends on what you want I guess.. You can find a cheap depth finder that is accurate or you can spend more and get something that’s puts out accurate readings when it comes to locating fish.