What Digital to Digital Converter Do You Use? Why?

Anyone try/use I2S Black Magic MKII from AfterDark

Denafrips IHave been using along time great build quality, great value 

and their whole line up sounds very good ,I own the Aries2,

pontus2 , Terminator 2 , the Terminator 2  makes everything sound great 

even streaming recordings Thst are not that well done , 

better then vinyl in many ways ,their Terminstor+ , i maybe looking into .

I use a Matrix between my Aurender N100H and my PS Audio DAC.  The DDC allows me to feed DSD128 and DSD256 directly to my DAC not that I can really tell the difference.

The 5 volt rail is the weak link with USB because it has the potential to pick up noise from the source.  With the Matrix, if you connect an external linear power supply, it isolates the 5 volt rail from the USB source, and in theory should improve the SQ because the LSU is used as the power source.

I've read on other forums where some people have said the external LSU makes no difference and others that have said it made a big difference.  It occurred to me that everything is dependent on the noise being generated at the source.  For example, the USB out on a PC might be more prone to noise compared to the USB out on the Aurender music server.  Does this make sense to anyone?  BTW, good topic! 

I use the DACs built into Hypex FA-series Ncore plate amps. Because those preamp/DSP/amps do it all in one unit (per stereo channel), are built into a a pair of OB-subs (one plate mounted in each). Allows active crossover and filtering of main speakers and subs while minimizing gear/racks/cables. DIY lifestyle system leaving only the sources visible. Also relatively inexpensive, leaving budget for other things that have greater impact - for me, room acoustics.

If you're dead-set on the best DAC, follow along with Gabster (YouTube) and build your own ultra-capacitor based unit.

I'm upgrading my DDC in a month.

Have decided on the Audio GD DI-20HE. Have a few mods booked in for it in the UK before I receive it.