I have only seen a Dave once and I did not get to listen to it. I tried a Hugo TT and found it superior to my QB-9 DSD in a general sort of way, but only single-ended, and I wanted a fully differential DAC, so I stuck with the Ayre. The TT has balanced outs, but even Chord says that it sounds best using the single ended outs at least from what I have read.
The balanced comes into play with your amplifier. If it's a single-ended amp, then you're good to go. If your amplifier has a balanced front-to-back topology, the balanced outputs will sound the best; otherwise your amplifier is lifting the load with one hand tied behind it's back. Balanced amplifiers require both balanced inputs and outputs to sound their best and engage all of the circuitry available for optimal operation. I don't want to argue whether "balanced is better than single ended", but as mentioned, it depends on your amplifier's design topology. Chord's comments were most likely intended if you were going to use it's headphone out. But if your amplifier (like my GS-X Mk2 or LL2) are balanced, then the balanced is the best option to use, not just theoretically, but through my experiences as well.