I have II-III on the '94 remasters. I have IV, Houses of the Holy, and Physical Graffiti on the original '90 versions. From what I can tell, the old ones don't sound bad, just somewhat hollow. You could probably make the '90 versions sound just as good as the '94 versions just by adjusting the EQ on your CD player. But I just traded in my old "Meddle" for the remastered one, and the new one sounds a hell of a lot better.