A Great guide to what's available

http://www.dvdaudiodaily.com/
this is probably one of the best places to begin the hunt for what's available and what is coming up. It covers both leading High Resolution formats, despite the title, although it does seem, as do the majority of the industry, to be more inclined towards DVD-A over SACD.
That aside, it makes for some very interesting reading as well as full details on players as well as the music.
Well worth a few minutes of your time IMO.