I've been through dozens of copies of this title looking for one that sounded "right". I just got a great deal (in part because the OBI is missing but no biggie to me) on a NM 1976 Warner Pioneer Japan pressing (Atlantic P-10123-A). Some would find it thin on bass as many Japan records are, but I don't mind tweaking the tone controls. The important thing to me is that it is carefully mastered and has the most even sound track to track that I've ever heard on this album. Great balance from song to song and none of the mid-track adjustments that plague so many of the US pressings I've heard. Plus the pressing is very quiet.
I still think that the album needs a new mix from the multis, but short of that I think buying more copies now would only be academic. I've heard enough to believe it's not getting much better than this.