DAC for 2016 MacBook Pro


Hi all, looking for suggestions for a reasonably priced DAC that I can use with a MacBook Pro running Audionirvana and that I will hook up to a WES Audio GES Amp in my office for listening with my Stax headphones. Under US$1,000.
Many thanks
James
vicks7
Benchmark DAC3 or 2 or 1 - all are top notch, and the older ones are about $600 used

Schiit DACs are Redbook only AFAIK
There's no such a thing as a Redbook only DAC. Some DACs may sound better with PCM signal vs. DSD, etc., but all support digital signals. Maybe I missed the memo. 
@ randy-11
better ask Schiit

My Schiit Gungnir Multibit handles inputs up to 24/192, and not just 16/44.