1st SACD Purchase

Snilf5.....If you say you like Part.....  get Fratres (Brothers).   It depicts monks decending stairs from above.   Its written in the style of Guillaum de Machaut.... about 1300

If you're a Morten Lauridsen fan I'd suggest Lux aeterna on the Hyperion label.  Beautiful and moving contemporary choral music.

It came out in 2017. It doesn't play 4K Blu-ray. It doesn't support HDR10. It doesn't have 7-channel RCA out. Comparing to OPPO205, it isn't even close. McIntosh is good in making Amplifiers, Pre-amplifiers and integrate Amplifiers, and that's it. They know if you have their amps and pre-amp, you want to complete your system with all McIntosh gears including Audio Video player and streamer. So they don't need to spend time and money in making the best.
Further, If you have SACDs, then buy an SACD player. You don't buy an SACD player then find some SACDs to experience how good your player is. I have been using OPPO for many years. The last and current one is the OPPO205. It does play SACDs, but I don't hear a big difference with other CDs. Finally, since you don't have SACDs, anf if you don't want to pay for an overpriced OPPO205, you can buy the Panasonic DP-UB9000 for $1000 and use the different money to but a very good streamer such as the Naim Uniti Atom. This pair will outperform your MVP901.
I know I'm off topic because you're asking where and how to buy some SACDs. So I apologize. :)

rcprince --  Hey, I've got that Morten Lauridsen CD, except mine is on the RCM label.  Not an SACD, though.  I played it a lot, back at the turn of the century.  Another modernist but eminently accessible, utterly beautiful piece is Eric Whitacre's choral work Cloudburst.  Definitely worth a try.  That CD, by the way, is indeed on Hyperion.

You might have a different ensemble, this Lauridsen disc is by Polyphony.

I have sung a number of Whiteacre works, like them a lot.  Will look for the Cloudburst CD.  Thanks.