Just went through all the Node models/differences thing. Google "bluesound node models by year" and/or "bluesound node model differences". I ended up picking up a Node with a custom power supply and internal power supply board of A-gon..sounds terrific.
The short version..get at least a Node 130 (2021 launch to more recent). You can find them used on us audio mart or here on A-gon for $250-$300. I think(my memory isn't great..I've gone through a ton of info) the N130 features an optical out(not on previous models) for connecting to an external DAC and a little better internal DAC. The most recent/current model has a much improved DAC.
Google the specifics I mention here to be sure, but this should get you on the right track.