I own 150+ quad or 5.1 surround albums on BluRay Audio, DVD-A, SACD, and digital releases. Here's a list of a few of the standouts. The ones marked with an asterisk are my go-to showcase surround albums I audition to friends/family and a good starting point for a collection. Some of these releases are available anywhere (Amazon, local stores), others are rare limited releases or imports. I didn't list any classical releases--generally, the surround mixes add the natural reverb of the back of the room to add breadth and depth, so you usually can't go wrong picking up a multichannel version of favorites. https://momix.click/ https://indigocard.xyz/