thanks for joining us!
seems as tho no one checking in has built one, but as the season grows near folks not checking in might see your post.
i have a marcum lx9 with built in camera and don't use it nearly as much as i thought i might. sonar tells me much more and much faster of what i need to know. what i like about it compared to the rest is the display. you only need the one display to have sonar and camera and can split screen the cam/sonar or full screen the cam or sonar or have the camera as a living wallpaper or back ground with the sonar data overlaid. this is in part why i chose the lx9.
if you don't have a camera you might think about how you'd use it if you did. this should help you decide if it's for you and what style you'd want whether you build it or buy.