I2S Recommendation

@audiostick I was similarly unable to find any info on the Voodoo Silverstream. Tried it on a blind buy since it was not very expensive, and was surprised at the sound quality being pretty great.

In my current headphone system (using Denafrips Gaia DDC, Denafrips Terminator 2 DAC, Holo Audio Bliss KTE headphone amp, and ZMF Caldera headphones, with some components being in flux as I figure out what I like) the Voodoo had the best detail of any other model I tried. Not overdone but could be a little bright at times, so you'd want to watch the system matching closely. With the right gear though it was pretty magical. 

The DH Labs was slightly behind in detail and resolution but made up ground by having a more fleshed out midrange/low end, which made for a better balance overall. I would not call the Voodoo "thin" in isolation though, just after direct comparison. It's possible or likely that in some situations the Voodoo is a better choice. 

@mitchagain Regarding your point number 2. My recent I2S HDMI adventures have shown me that almost all of them use the same HDMI standard (which is official, sort of like USB), and it is up to the DAC and transport or DDC designers to determine what pin configuration they use. But the cables themselves are almost universally standardized.

I did come across some custom builders who would special-make an HDMI I2S cable to enable going from say a Pink Faun streamer to a Denafrips DAC (they use slightly different pin configurations from one another) but this was pretty rare. That means mostly you can just shop for any HDMI cable and you only have to worry about the standards used by your DAC and transport. It also really helps that some brands let you choose multiple configurations either via hardware switch or in software. 

I will add Revelation Audio Labs HDMI I2s cable to the list of suggestions. I have one that replaced my Tubulus Argentus, the solid core silver is much smoother midrange with all the details, better soundstage width and depth. 

I tried the DH Labs and RAL i2s cables.  At first I thought the RAL sounded better, but went back months later and did some extended listening switching back and forth between the two, which is easy and can be done quickly since my server and DAC both have 2 i2s connections.  I couldn't tell any difference between the two.  I chalked up my initial impressions to confirmation bias.  I'd get the DH Labs cable.

Tubulus Concentus V.2

My wife does not listen so closely but heard the difference. And the owner is really patient and nice to deal with. A little less expensive than other top-end I2S cables and right up there with them. I would not want to be without my Tubulus Concentus.   

Also, While shorter is better as stated above, the owner assured me that with their design adding no more than 1' is not hearable. This matters if you are using a rack because good I2S cables are a bit stiff coming out of the connectors, needing more turning circle.

-Jeffrey in Philadelphia

I wired my theater system with Pixelgen cables and it made a noticeable difference in the display, although I didn't notice much in the way of audio improvement.

https://www.pixelgendesign.com/ca/thxinterconnect/shortrange