A bit off-topic here, and remember, this is just a poll, if you prefer a format for whatever reason, that's good enough. No one says we all have to agree!
My Acura plays DVD-A (and CD), and I also have a 64Gb iPod sitting in there that is almost completely full with most of my CD collection. It's great! The titles and menu's appear on the NAVI screen, and having almost any song I can think of availalbe to play on a whim is great. I can even press a button, say "Play Artist Steely Dan" and it goes right to the tunes by Steely Dan! The car even plays them through a Dolby PLII decoder, which is how I find the "good titles" to try with SPEC. The car also will store music on an internal HD and I can also plug in a USB stick instead of the iPod to get music.
Still, the internal decoders for DTS and MLP/DVD-A are not within the audio routing path of the USB/HD/iPod inputs. I tried a USB stick with a DTS file, a Dolby Digital file, and the system does not recognize these files. You can load a DTS wav file onto an iPod as a wav file, but the car will not accept the wav playback as it does not go through the decoder.
It would be SWEET to fill up a 32Gb USB stick with DTS encoded audio files and keep them in the car, but it doesn't work (for me). So, I make my own DVD-A's and am happy. I know it's hard to believe, but I don't listen exclusively to surround music in the car. Believe me, those tunes on the iPod get plenty of play in the Acura!