MotU Ultralight 5?
Anything in that same price range from Topping?
Minidsp Flex with balanced outs?
That said, I have the ADI2-DAC and it has operated flawlessly. Love the remote as well, helps me become even lazier while at my desktop. If I recall correctly, Amir may not have actually recommended it.
He recommended it for its suite of functionalities as a DAC/preamp/amp/DSP all-in-one, but in terms of its measurements as a pure DAC it did not rise to the level of several less expensive offerings. And he had some ergonomic reservations about its settings interface and some compatibility issues with Roon.
Since the release of the RME ADI-2, Topping, Gustard and Okto have produced units that outperform it on the oscilloscope for considerably less cost (although whether the nuances in SINAD and multi tone are audible among his current top ten is dubious, and pretty much all of what he refers to as “modern” DACs are nailing linearity).
I think for those looking for a full-function audiophile setup in one device, the RME still sits at the top (if MQA is not an issue). Personally, I chose to go with the Topping D90se with an iFi Pro iCAN Signature as my amplifier, a choice I made to accommodate very power-hungry cans, to add some analog bass emphasis with the ifi’s xBass feature, and to make the most of my Tidal subscription.
In terms of alternatives, the new Gustard x18 got a rave from Amir and it’s even cheaper than the d90SE at $799–and it also does not have the S/PDIF input receiver hiccups the Topping has. The only downside I see to it is a curious lack of I2S pinout compatibility adjustments, if that would be an issue for some reason.