I was in the same boat going from Qutest with Sbooster + ultra to a new DAC. I wanted the Qutest sound… but better.
For me, I wanted to avoid Chi-fi and tubes. I chose to go with the Briscati M3, available used in your range. I chose to go used. The following was my thread. https://forum.audiogon.com/discussions/dac-recommendations-under-7k
Unfortunately, it is not scheduled to arrive until Monday, so I can’t yet provide any listening impressions. The LTA came highly recommended.

