@brewerslaw Just because you bought tons from iTunes doesn't mean you're stuck with Apple Music forever. When you stream it, they don't even play the best version of the files. They shrink to save bandwidth. Your best bet is to store you Apple purchased files in AIFF on a NAS or USB drive. Then you can play those with any decent software on a streamer even if you don't have a service subscription to Qobuz etc. Roon would make for better metadata. One super annoying thing about Apple is they don't by default place album art .jpgs in your folders. You can easily fix this some cheap or maybe even free software. But that's a whole 'nuther conversation.
@grislybutter buying an amp before choosing what speakers you'll use them with is like buying your favorite tires because they'll be the "spirit of your ride" then looking at what vehicles fit those tires. Speakers vary far more widely in design and each needs an appropriate amp. The delta between appropriate amps will be significant, but nowhere near as wide ranging in possibilities vs. the myriads of speaker options. You wouldn't want to buy monster truck tires and then decide you'd like to drive a Miata. Cheers,
Spencer