Ok,
So I will try and explain what I am looking for and see if it makes sense to anyone else. Right now I have a Helix 9 Chirp SI+ GPS G4N CHO at the console. I have a Helix 7 Chirp DI+ GPS G3N at the bow. What I want to do is move the Helix 9 to the bow and get myself another Helix 7 for the console and run 2 up there. One I would mostly use for Chirp and 2D mapping on a split screen and the other would like to use it for SI or DI or a combo of both. If I am able to find a good used model what is the earliest generation I can go to just to use it for the 2D and Chirp? I also have an Terrova and an ethernet switch so all my units are networked together. Eventually I want to add a 360 or live and figure the Helix 9 would serve me better for that up front. I have a Lund Adventure Sport 1775 and it is very restrictive on what size I can put at the console so that is why I was thinking of putting 2 Helix 7s there. Hope that made sense to you all.
Thanks in advance,
Steve