Oh boy Jeffrey, you have hit everything on the head with a big hammer.
I installed the Apple 4K box a few days ago, and have not even gone near my ripped music.
#1 having listened to Tidal in Atmos for quite awhile, the Apple 4K Atmos albums and playlists kills Tidal in both selection and audio quality, a much stronger signal with Apple 4K-Apple music.
I just finished listening to Dolby Atmos from the Sgt Peppers album which was only released as a box set with 5.1. What a treat it is to get the same in Dolby Atmos. And you get lyrics on all, big plus. I have the lyrics feature on with my JRiver software, works great.
Shit, I am a little nervous actually that I will lose my desire to listen to my ripped music library while there is an incredible amount of music in 24/48 lossless quality with Apple music playing via Apple 4K tied (HDMI) into my main rig.
Hopefully I am just experiencing a new GREAT TOY, that will subside in the future.
I have already listened to many songs in Atmos that I don't see being available in any kind of surround, EVER.
Regarding purchasing, at $15.00 a month subscription for Apple 4K with Apple Music, that's two 16/44.1 CD's on a good day.