UPGRADE PATH FROM CHORD QUTEST

To add to my post (no longer editable), while not all of my Qobuz streaming sources sound wonderful, Diana Kroll always does, as do many others (virtually anything 24/192). Very happy.
BTW, the Chord Hugo Master Scaler sounds intriguing. That plus tubes could be your solution & within your budget. But start with tubes IMHO.

When I bought my NOS tubes, I thought I would sell my stock JJ tubes on eBay. They are going for $25 a pair… not worth the effort & demonstrates what people think of them. Food for thought.

Oh the problem is Diana krall. It’s the main problem for most audiophiles and all audio shows. Just stop listening to her and you’ll be fine. 

Even if you decide to try a different dac,I agree that that the stock tubes in the RP1 are known for a clean modern sound and will continue to hold you back from the presentation you're looking for.I like RCA Cleartops in mine, a touch of tube warmth with a more organic sound.Think about trying different tubes before changing equipment.

I have not owned a Chord DAC, but from what I have heard, they are pretty detailed. It may be that you don’t like the sound of tubes on the front end. Trying out some SS preamps might be the ticket. The BP-19 is certainly a good candidate. 
 

When I asked Rogue for their recommend tube upgrade, the RCA clear tops were on their list.
Another data point, I brought my RP-1 based upon another Audiogon recommendation. He stated: “So after switching out the two stock J&J tubes that the RP-1 comes with (to Mullards) I was completely sold on the RP-1 and it is a keeper.”

Just out of curiosity, what is your reluctance to change out your tubes? I guarantee you will significantly improve your sound for a (relatively) small investment.