Sirius radio quality vs redbook cd player


Have an Arcam FMJ 27T cd player and am also streaming my cd collection saved to HD using iTunes (lossless format) to a Zardoz (modified Airport Express). I'm considering subscribing to Sirius internet radio and streaming that to my stereo system; so I'm curious about the sound quality of Sirius internet radio vs redbook cd. Anyone have an opinion?
rockyboy
I just got a trial SiriusXM in my new Subaru Forester. Obviously not like top line Mercedes or BMW quality system-I’ve had them :) However, I’m finding the sound quality very good for car radio in this vehicle. Very happy to have the variety that’s just otherwise available in the Vancouver area of BC. I think it a no brainer for country folks : ) and May keep it if sweetie like it ; )

Man!!!! I Thought i was the only one who had issues with XM Radio.
i use it for talk radio, but then i was sent a notice saying that my monthly 
fee would go up to i think $235.00 because of artist royalty fees's and that is when i got TIDAL streaming, then i found out that not all the good music was MQA  ( JAZZ FOR ME) then i lost interest in TIDAL because i was lied to, then i found out that LG made a Cell phone with a built in DAC chip that plays MQA Model V30 AND G7 has a 32bit quad dac. i fell back in step with my music.