The rDAC looks like a neat unit that has elements from some very high-shelf designers (dCS and Wolfram). Arcam also has years of experience producing top source gear without balanced outputs.
Suggest you might want to
- Use USB (with length of 8 feet or less - and forget using any wireless) to take full advantage of Asynchronous mode.
- Experiment with feeding it battery power, to replace its stock, inexpensive, switched power source.
Let us know how it works out for you.