Not to complicate matters further, Roon ready (endpoint) devices like your Boulder still needs a server like Nucleus to stream from Qobuz or Tidal. Be careful with Roon implementation, you can easily end up with a maze of accessories and devices, both Etherregen and Nucleus requires LPS (linear power supplies) to perform at their best.
I would add a passive filter from Network Acoustics for next level improvement before you venture into replacing the Node 2. @grannyring has direct experience with ENO and latest MUON filters. I have moved on to Telegartner M12 switch which in my opinion, has no peer and substantially better than ENO but at 6x cost once you factor in cables and linear power supply.