Lots of people (including audiophiles) would likely think that I was a fool to pay ~$6k for a DAC. But I'm very happy with my Aqua La Scala, and do not believe that paying multiples more could possibly provide other than wildly diminished returns.
In fact, it would be far easier for me to believe that there are DACs that cost half, or a third of the La Scala, that also sound really good, than that $15k or $25K DACs sound significantly (if at all) better.