Okay great. Thanks very much for your help, I super appreciate you taking the time to respond!!
A new boat with new toys, sounds awesome. Good luck out there this weekend!
I think I am going to do as you say, go with the 2 (console) and 2 (bow) approach… so I’ve got some shopping to do. Hopefully in time for a weekend install.
Thanks again!

Thanks very much for the input Plomp!
I had considered getting the ethernet hub and just networking everything together. At first I thought this may have been overkill with too many screens. However, I guess it makes more sense to have one screen dedicated to the mapping? If networked, none of the mapping detail is shared, correct? Would need multiple nav cards?
Would love to get the Mega 360. That would mean another upgrade. haha
My Helix 9 (Gen 1) is just a sonar/GPS unit, Helix 7 G2N is an SI… from your knowledge.. am I able to share the same detail (ie. SI/DI) to the Helix 9 (not an SI unit) as I would the Helix 7 (from my Helix 10 mega SI/DI)?
Apologies if these are newb questions!! But I am kinda of a newb to this networking piece. haha
Thanks very much again!