Dac/AMP suggestion for He1000 v2

Hi,
I have done some research on this forum and outside but have not been able to find answers specific to my questions below. Please let me know if my questions are redundant and already answered -


Current Setup - Astell Kern Kann Cube (5 pin xlr ) -> Violectric V 200 amp -> He1000V2.
Looking for - Dac and Desktop Amp for He1000 v2 new or used. Amps can be headphone amp.
Budget - 4k-5k USD total
Comments: Looking for a relatively warm sound signature, but I am not a bass head either. Hopefully realistic sounding system. I do not own a lot of music, mostly stream from Qobuz and Amazon HD music. Would eventually like to move to Dante based system (I'll get a dedicated computer building later). I listen to pretty much all kinds of music except metal. I do enjoy vocals more, both male and female. I wish to use the DAC for two-channel system someday if I can ever get to setting it up. For me, tonality is the most important aspect, followed by timber and texture followed by sound stage.
Questions:
1. What are some dac/amp combo for He1k for the next level and what do these combos bring to the table? If i can find some baseline suggestions, it will be easier to research from thereon.
2. Are there USB solutions (hopefully not too expensive) that sound good? Till now I do not have any experience with USB audio. I do not yet use the computer to play audio. If there are good USB solutions I might try that when I set my computer up instead of Dante.

 

https://www.superbestaudiofriends.org/index.php?threads/the-all-purpose-advice-thread.19/

 

Thanks. I posted it there but did not get any response. I'll post it there again.