I'd like to know where I could buy some more SACDs. I've looked on Amazon but it confuses me.
You are not alone!
Probably owing to the massive number of items for sale on Amazon, and the huge number of sellers / resellers besides Amazon itself, there's bound to be some confusing listings - title, description, reviews etc.
If I'm looking for a specific SACD on Amazon.com, unless all of the details in the listing clearly show that it's an SACD, then I don't buy. While it has never happened to me, if that listing said it was, but the delivered product was not, then I know it would be relatively easy to get my money back.
Adding to the confusion is that some SACD packaging itself can make little or no mention that it is an SACD. For example the packaging for the 2002 ABKCO Records reissue of a large number of Rolling Stones albums on SACD does not mention "SACD" at all. They say "DSD Remastered" instead. Just something one learns.
But here's the thing: you can start out doing Google searches for "SACD for sale" and "New SACD Releases" and "best SACDs" and... you get my drift. That will identify tons of discs - and sellers offering those discs. And in almost every case (in my experience) if you then, after those searches, plug specific album titles that you found, with "SACD" added to the search string, into Amazon.com's search bar, then you will likely find it listed, and listed for the best price - either by Amazon or its resellers. Sometimes just the title - and then clicking "any show all formats" link will get you there as well.
The other thing to keep in mind, is that since your new player handles them, you should also be looking for DVD-Audio. While they use different technology, in the end both SACD and DVD-Audio sound identically great. More often than not, a title was / is only released on one of the two formats. (Hotel California is a title that comes to mind - DVD-Audio only.) Hence the need for players that handle both formats.
Oh and try Blu-ray Audio as well. Searching for that will turn up movies as well, so narrow it by adding "pure audio" and "Audio" in the search string.
And of course, you can always ask us for recommendations / ask questions about specific titles. (I'm still working with one typing finger so am slower to respond than usual - for now.)
Jeff