Hfl, while not necessarily opera, I'm pretty sure female vocals in the high register are part of the vast majority of DAC evaluations. I personally always play some Rachell Ferrell (Jazz), who has a six octave range.
For what it is worth, the top of the line MBS stuff can handle what you are looking very well, but the pricetag may be prohibitive. I'm not sure how close their "budget" analog DAC comes to this level of performance.
For what it is worth, the top of the line MBS stuff can handle what you are looking very well, but the pricetag may be prohibitive. I'm not sure how close their "budget" analog DAC comes to this level of performance.