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

If you want a streamer that also has DAC inputs then your best bet is the Teac NT-505 which works on the Lumin operating system.  I've owned one for almost a year and a half and it works and sounds great.  The other options in this price range like the Lumin D2 and the Zen Mini Mk III with LPS don't have any inputs.  A Node 2ci and a DAC is not an acceptable solution from my perspective as over four years ago an Auralic Aries Mini easily bested the Node in head to head listening tests.  Nothing has changed with the Node 2 since then other than the addition of 5 ghz wireless.  So a used Mini would still beat it. 

Has anybody tried the Auralic Altair?
Aurender?

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.