I second Murrayburke’s post... If you just need USB or S/PDIF, the BorderPatrol SEi DAC is terrific. I have one and it’s been a mainstay in my system. Nice analog-like sound. It’s an R-2-R with no oversampling and no digital-filter. And for the top of the line its under $2K... I also have the Denafrips Terminator-Plus which is also terrific although a good bit above your $$$ range...