By all means rip them from a good known early uncompressed CD to a hard drive.
But to stream them from a streaming company you are sure to get the later compressed version, of what you bought from Germany.
And your right you can bump up the level so much more without it getting confused, because the DR is so much better your ears/brain hears the quieter parts better, it not a wall of fatiguing loud compressed sound.
Cheers George