fitPC for Raymarine RNS and OpenCPN

[SFH]

I intend to install a small fanless PC at the chart table capable of running Raymarine RNS 6.2 including radar and AIS overlay and OpenCPN with AIS

I want good graphic performance but do not really need a space and power consuming laptop. Further I like to keep screen and PC separated

The fitPC seems to be a good solution but I have some doubts on which model/configuration to go for since there seems to be a wide range of models from the fit-PC2 to the fit-PC4 with different CPU and GPU.

Which one should I go for?

/Steen