hey Rck60s ,
A better unit than that sony is the Kenwood xxv-05v, it will play DTS and dvd-a as well as dvd-v homemade and otherwise. I use it and I have a Pioneer avh-p7500 that will play the same, it is actually a slightly better sounding unit but I only pull it out for competition use.I've competed against that sony and it is not impressive. it will however play sacd I believe . I am not a very big sony fan though when it comes to 12v audio. In the world of car audio competition, sony has only gained respect with its mono block amps. I also make my own DVDA discs w plogue (dts is too lossy for me ) I play them with no trouble on either of those two head units. Either of those heads will cost you a little more than that sony but I think they are worth it. You will however need amps for these units as they are audiophile heads they require outside amplification but if you are really looking for good sound you never want to utilize a head units built in amp, if it has one.