@hilde45 I've done a similar jump, so here's my experience in case it's helpful.
BlueSound N130 stock -> added PD Creative upgrade -> added Denafrips Venus 2 -> added Denafrips Terminator Plus -> upgraded to Lumin U1 with X1 PSU into Termi Plus.
Upgrading the power supply on the Node yielded better sound across the board and was fantastic bang for the buck. I noticed most improvement when using the inboard DAC on the Node but there was still improvement when feeding an external DAC. Highs were clearer, more bass, music had more energy, and soundstage was more precise.
Moving to the Lumin was night and day (as it should be for 10x the cost). The improvement was not subtle. Darker background, cleaner and clearer treble, significantly better bass and texture, midrange bloomed, and the soundstage was larger and more precise, and music was simply more engaging and lifelike.