My 2c... All you can afford/power...
BUT,,, I am an EE and understand the interaction of all the stuff. My ideal system is a laptop
at the inside nav station coupled (preferably by Ether Net/ aka SeaTalkHS if Ray-Marine) I set this up on PANGAEA, Manta
44' PC, so I could set up routes with a full keyboard and transfer them to the E120 display at the helm
. Hate to name a way-point with a rotatory dial!!
OBTW... Pangaea PC is available to a loving owner... Tethys-Society.ORG
Happy Cruising Gene