Based on pics, I would say the Hegel H80 is not balanced internally. That being said, I am going to assume that the balanced inputs would be a benefit because the XLR would (typically) drive both the positive and negative lines on the input circuit (possible an opamp). The input circuit would convert the signal to "single ended" internally inside the Hegel.
That being said, it would really only be truly beneficial if the DAC you chose had real balanced (differential) output circuits. There are DACs that do have an XLR output, but the negative polarity pin is not really generating any signal -- usually it is just shunted to ground, possibly through a resistor.