First of don't buy the ES127 for a couple of reasons. Raymarine runs about a three year life cycle on a product line and maybe another three years of serviceability after that. The ES is already a year and a half old. Think stale bread.
Also every ES we have had in the
charter fleet mounted outside has
lost the touch
screen at about a year old. Raymarine has made good on all of them but it is a PIA.
Buy the new Axiom it is not much more expensive and is a very nice plotter. No buttons on points of entry for
water on the surface. As for pricing any dealer on Amazon will likely be as
cheap as you can buy at the retail level. Raymarine is running a rebate right now.
Other wise your wish list looks good. You need to draw the
Seatalk NG
network out. You will need a multi
plug at both ends of the back bone. One at the pod or mounting location for the outside plotter, instrument, and
autopilot head. Then another inside. If you go with the Axiom you will need an NG to nema2000 cord as the new Axiom line is Nema not NG. You also will want to be able to hook
GPS up to you
VHF for
DSC calling so you will likely need a nema cable fro that as well.
Jay