Led Zeppelin IV vinyl

I have own both and the vinyl makes the cd sound like an mp3.

Now I don't think it's the best produced Zepplin album. Jimmy Page spent way too much time in the studio trying to perfect the album and honestly I think he screwed up the mix. In my opinion Zeppelin II sounds the best.

Houses of the Holy is the best sounding of the original pressings.

Can't speak to any of the reissues.

I agree that the CD versions sound absolutely horrible. I own the 200 gram Classic Records reissues of II, IV, and Physical Graffiti. They all sound phenomenal, but I'd have to say that Physical Graffiti sounds the best. But I've heard some of the original pressings, and they alone blow the CDs out of the water.