The I2s standard is pretty much theoretical. To me, the main advantage of I2s is being able transmit digital data with fewer conversions and clock. Unfortunately, many I2s devices don’t transmit clock signals, or the DAC isn’t setup to receive and use the clock.
My Aurender N20/May Holo DAC KTE aren’t quite up to my analog, but very very close. To be fair, my analog cost many times what I have spent on digital, so I consider the Holo to be a great performer. Where it sits today compared to other DACs in this price range, I do not know.
The PS Audio DAC 2 wasn’t out when I purchased the Holo, but it does come with a 30 day trial period, so that might be a good place to start. I would ignore the vitriol around the subject of hum in that a trial in your home would suffice and be more relevant. I don’t know where you can do the same type of trial with the T&A, but that just might be out there. I believe that they are priced the same.