zacjones,
here's my 2 (1.5 CDN) cents on your concerns/questions on dts/dvd-a/sacd audio dics and players.
To all, please feel free to correct me or comment on technical specs/numbers-I am going strictly by memory here.
1. dts cd's are based the on the original red book standard (44.1 kHz)using a regular cd to play back on. The most of the dts cd's were initially done by dts entertainment. Interestingly enough, the dts cd' are NOT authorized to use the "compact disc" logo.( at least to the best of my knowledge). Most, at least the one's I own, are all 5.1 multi-channel cd's.
2. DVD-Audio is based on the red book II standard (48kHz) using a DVD disc to play back on. DVD-A comes in 3 possible flavours-1. Hi Res + DD + dts; 2. Hi Res + DD ; 3. Hi Res + dts. In order to listen to the Hi Res "track" you must have a DVD-Audio enabled DVD player otherwise you can only access either the DD or dts "tracks". Since I don't have a DVD-A enabled DVd player I can't tell how much better a disc will sound. What I can say is that I have The Eagles Hotel California-which has all 3 formats-I've listened to the DD which sounds somewhat better than regular cd but the dts track sounds much, much better than the DD tack!
3. SACD threw the red book standard out the window and uses DSD-Direct Stream Digital- as their recording format using a DVD disc to play back on. Quite simply, instead of having 16, 20 or 24 bits, Sony and Philips the co-creator of SACD and the CD, just made the signal into a 1 bit stream that is sampled at a very high rate. When analyzed, the signal resembles an analogue wave form closely matching the beloved LP signal. The original SACD's could only be played on a SACD player-this is still true if you wish to listen to the SA portion of the disc-more recently hybrid SACD's have become available. But again, no SACD player, then you can only listen to the DSD red book layer of the disc, which is better than the old red book standard.
I have an Sony SACD player and a few titles, all I can say is WOW! I listened the to Stones Honky Tonk Woman and you would think that the Stones were right there in the living room. Pink Floyd DSOTM-double WOW!
I can hardly wait to do my upgrade to a Denon universal dvd player. BTW, Denon is the only universal player that uses a Sony DSD chip all others converts the DSD signal to something else(MPEG), which defeats the purpose of Hi Res audio, IMHO, prior to sending the signal to your receiver.
Again, just my 2 cents.
kwankung