I read somewhere that The Beatles White album and Jimi Hendrix's - Are you experienced where considered as the 2 greatest rock album ever, to this date. Not because they necessarly have the best songs (althought I think they do) but because of all the fresh new ideas they braught into mixing and composing and adding on top of that a killer new look and standard to what is rock music. They influenced all the other rock groups after that. Still to this date they continue to be very inspiring and I think they will never go old.