Listen, I hear and have heard music enough in my life and I know the differences. For my music I encode at a minimum of 192kbps, but for Amiga music it would make no difference or metallic artifacts. Unless you use the stupidest MP3 compression around.
Also, if people want the full-on experience they should download the MOD file and play it in an Amiga, or in Deliplayer.
The quality of Amiga sound is actually quite bloody good, the thing is, the music in games and demos use sounds that can be smashed down to smithereens with compression without fears.