Ok-thank you very much for all the answers. It's great!
As I wrote I have not bought the equipment yet, but I've seen most of these instruments in use, like their functionalities and trust the quality. It is however not paramount that it must be these parts. Im very open to suggestions that will simplify the installation. At a first glance on your feedback it looks like i could replace the Raymarine parts with something NMEA 2000 as I could remove the need for NMEA 183 all together? Any thoughts on that idea? Specific equipment suggestions are very welcome
Once again thank you.
@Knuterikt: Yes the S1 was correct. I found a cheap one, but I might replace it in my inventory to simplify installation.