I have hundreds of Classical SACDs. Rather than list standouts let me recommend a few labels. This by no means comprehensive.
First off, for new DSD recordings, I recommend the Swedish label BIS. (They were purchased a bit back by Apple, but so far they haven’t destroyed the quality). Particularly with small ensemble recordings, I have had many discs where the musicians sound as though they’re in the room.
Tower Records of Japan has an excellent collection of analog recordings, mostly from the seventies, remixed for SACD. I am particularly fond of the Karajan and Kurt Sanderling reissues. Pricey but there are deals on eBay

