“CDs being the source of the highest quality sound.”
Wait till you hear higher quality!
CD’s are 44khz and 16 bit. 96 kHz 24 bit will knock your socks off with the right recording and equipment.
There are hd audio downloads sites that give free samples.
I am streaming Amazon HD.
I also have a few SACD and DVD-Audio discs. The problem with all that from *my* standpoint is 1) I live in a condo building (thin walls) and 2) I have moderate hearing loss.
As a result I use headphones when watching movies and when listening to music...except in the car of course.