OP,
Let’s start from scratch here.
You have a good piece of high end audio equipment, the Mark Levinsion 585.5. You do not want to be hooking that up with iPads, laptops or PCs. These are very low quality sources and will be reflected in the output you get.
Apple music and others through a phone or iPads are great for travel and headphones.
There has been a huge amount of change in the digital arena over the last ten or fifteen years. I have had all sorts of these things along the way.
Today, if you were going to assemble a digital system you would buy a streamer and a DAC. No CDs, or SACDs. These players are transports + streamers + DAC.
At nearly all price levels a good quality purpose built streamer with Qobuz can sound as good as a vinyl, CD, or SACD system. Buying physical disks with files on them, buying and buying music files have come and gone (lots of folks still do it, but the age has passed).
‘’You can look at my system. I have a top notch vinyl system, and can play CDs. Streaming has the same sound quality, often better, since Qobuz offers over +1/2 million high resolution albums with millions of CD quality for $12/month.
So, you need a high quality streamer. I recommend Aurender. You control it with your iPad. Roon adds another level of complexity and cost. Personally I don’t find it useful. Some streamers support it. Given your system, I recommend investing about $5K in a streamer… although streamers sound better the higher the price. Aurender only produces the streamer and arguably the best high end in the business. There are lots of good ones. I don’t recommend one less that $3.5K… but you must find the right one.