I’m sure they’re nice, but they don’t support Apple’s Hi-Res Lossless Audio up to 24-bit/192 kHz.
1. I think you'll struggle to find anything actually recorded at that resolution - the majority of electronic music is 44.1 or 48khz, anything "hi-res" (which makes no difference anyway) is going to br 88 or 96khz. I wouldn't be wasting my time or money playing back 192khz when you can just buy an excellent DAC that will actually make a difference at the sample rates the music is actually delivered in.