Marcum LX-7, bought it two years ago and sent it in on Wednesday to have it upgraded to the LX-9 (adds the camera and DVR).
The nice thing with it is they upgrade the firmware-u hook it up to your computer and you now have new options etc....
Unlike some others where once you buy it, the technology is already old or "locked in."
I am no pro at fishing, at all, in fact this is my second post on this forum, but the marcum is a lot better, imo, than Vexilar.
Better target separation, viewing options, and does not look like it is from 1980.
I also bought, but am now selling, the open water transducer (as I have a different system on my boat) but u can use this in the summer on your boat as well (with the 200.00 high speed transducer).
Overall couldn't be happier.