spend on the streamer or on the DAC ?

My own experience with chasing dacs to focus more so on the source , it was the source that clearly more satisfying results .

First, I'd advise laying out something of a roadmap, and budgeting for the potential additional pieces, including cables . Are you currently doing Roon?  Is that something that you wish to consider?  Apart from a DAC, would a Roon Nucleus or some other Music Server make sense.   With a 5000 Euro budget, there is an awful lot that is available to you with that type of spend.  All things being equal, I'd start with the DAC, continue to use the Node 2 as your streamer, and go from there.  That being said, would still advise taking it step by step, seeing what you have with each new piece added to the puzzle. If you have a trusted dealer you can work with, all the better.  Take your time and enjoy the journey. 

+1, mgrif104.

Node 2i is and will be a average sounding device even with an upgraded DAC. A good streamer (check out Lumin, Aurender, Innuos) and a separate DAC will be a solid investment if you’re serious about exploiting the true potential of high resolution streaming available through Qobuz.

Both Lumin and Aurender also offers streamer with built in DAC within your budget.

I've found that both the streamer and DAC are of almost equal importance when streaming music. I moved from Node 2i to Sonore opticalRendu streamer in my 2 channel system and the improvement in SQ went above and beyond my expectations. At least in my case, the biggest impact was a noticeable reduction in the noise floor.

i agree with other posters on the importance of figuring this out for yourself, in your house, using your network or wifi internet signal-feeding setup

i disagree with others saying there is a significant SQ improvement going from a BS Node 2i as a streamer (digital out only) to more expensive streamers (I have tried Innuos, Brooklyn, Auralic) -- at least that was contrary to my experience

in my experience... using the Node 2i as the base case, the DAC upgrade rates a 7-8 (10 scale) on its impact on SQ, whereas a digital streamer change rates 1-2

my house my system my ears my internet connection

to op ... you have node 2, not 2i... i am not clear on the sq upgrade involved there, either in its streamer or dac sections