Options for $1k or less DAC?

A used Ayre Codex would be my recommendation.
-Switching from Spotify to Qobuz will show a definite improvement upon sound quality.
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for under 1K, would go with the Denafrips Ares II. Have not heard all dacs, but its the best I have heard for under a kilobuck. and will do both USB and SPDIFF inputs.

Good suggestions so far, if you wanna pursue a tube DAC,

https://www.lineartubeaudio.com/products/mhdt-labs-dacs

“The differences that show up between streaming services / quality is likely minimal.”

That’s not my experience. With a good DAC, you should be able to discern differences in SQ. Sign up for Qobuz trial and let your ears guide you. 

Thanks for the suggestions so far everyone.  

Piggybacking off of the USA DAC thread -- schiit bi-frost is getting alot of recommendations. I've also been looking at the BorderPatrol SE and Mytak Brooklyn Bridge (both used would come in just below $1k).  

Being new to DACs should I expect the same difference of say a $100 phono pre and a $1k phono pre?  Big difference to be sure.  Not sure if it's the same in the digital world.     

I'll give Qobuz a try eventually.  Amazon's "Ultra HD" will top out at 24/192, but my guess is Qobuz has them beat in terms of content though.  Everything else is on Amazon 16/44.1.  Heh... plus, if I make the switch the kids can't steal the streaming connection!


  

Lots of choices in the under $1,000 used marketplace.

Schitt, Denafrips, Chord, Ayre, LKS,... take your pick. All are solid performers.

It all depends on how it integrates with the rest of your chain and if you like the result.