Suggestions for a top flight streamer/Dac around the $2000 mark?

I've had an Altair for over two years and I'm extremely happy with it.  It's not supposed to be as good as Auralic's separate units, but it's awfully close and I doubt I could tell any difference. Set up was easy and sound wise you can adjust the dac's filters to your preferences.  Personally, I like the idea of a streamer/dac combo where you do not need an extra cable and the two units are designed to compliment each other.  With the older Altair, you can always add a different dac in the future if you like to 'upgrade' often.  However, there is not much need to.  I don't think the new Altair G1 has a digital output to add a dac.  A used Lumin T1 would be a good choice also, but it's a bit more expensive.

+1 Teac NT-505.

Can't make a specific recommendation but I too like an all in one streamer/dac. One less ac cord and cable which you can put towards the unit so maybe this can increase your price point.

Lumin U1 mini has stellar reviews and top notch support.

A used Auralic Vega G1 might possibly fall within your price range....

https://us.auralic.com/products/vega-g1?variant=30892283920517

Were I to need to replace my Aries Mini, I'd opt for an Aries G1 (I have an external DAC).  Been very pleased with performance from the Mini; it's my most-used source component.