I have 2 albums that I love, that were not very popular or well know, but sound fantastic and contain excellent music in their genre. Here you go:
dada - "Puzzle" - an excellent pop/rock album with great pop/rock songs, excellent musicianship and great sound quality. One of my top 10 favorites for both music and sound quality.
Supertramp - "Brother Where You Bound" - IMHO, Supertramp's best by a good margin. Very cohesive album with great songs, great musicianship and fantastic sound quality. Plays almost like an epic theme album (although I don't think it is). One of my top 10 favorites for both music and sound quality.
dada - "Puzzle" - an excellent pop/rock album with great pop/rock songs, excellent musicianship and great sound quality. One of my top 10 favorites for both music and sound quality.
Supertramp - "Brother Where You Bound" - IMHO, Supertramp's best by a good margin. Very cohesive album with great songs, great musicianship and fantastic sound quality. Plays almost like an epic theme album (although I don't think it is). One of my top 10 favorites for both music and sound quality.