The websites mentioned already are good sources for SACD and classical CD reviews. Of course the audio publications also review recordings and make recommendations. In addition, I've found the music forums on Audio Asylum very helpful both to find new good music and good recordings. They have three forums, "Music Genral", where mostly classical and jazz are discussed, "Music Hip-Pop" where pop, dance and other musical genres are discussed, and "Music Rocky Road", where rock music is discussed. These forums get more traffic than the music circle here on AC, so I visit them two or three times a week.
I have to say that I've been very happy with the music I've purchased based on recommendations I've read there.