A two-unit (small component) set-up well under $1K, the iFi iUSB3.0 > iFi Micro iDSD DAC that will smoke most DACs three times the cost.
All the iFi line sound great at a very low price point:http://ifi-audio.com/home/products/micro/
I travel for work constantly, but after using iFi gear at work I also run the above at home on my not-so-portable McIntosh 601s > B&W 802d and still find iFi one of the best DACs out there at any price.
All the iFi line sound great at a very low price point:http://ifi-audio.com/home/products/micro/
I travel for work constantly, but after using iFi gear at work I also run the above at home on my not-so-portable McIntosh 601s > B&W 802d and still find iFi one of the best DACs out there at any price.