Hello!
It is widely believed that the most audiophile quality is the first press made in England. Having in the collection a fairly large number of the first and later editions made in the USA, England, W. Germany, France, Japan etc, at least for the first 3 albums, I can confirm this. Since the 4th album, this is very subjective, but some US editions sound more interesting, IMO. From my point of view, if the English first presses are considered audiophile quality, then the American ones are the flesh and blood of real hard rock music.
At the same time, some W. Germany editions (original) have a very good bass, such as LZ II.
As for the reissues, the later releases, say since the late 80s, sound completely different, with a different remastering, from my point of view with a clear touch of digitization.
In this sense, if the price does not matter, then the UK originals (they are also the most expensive) have a collector's value. If we start from the value for money, then first of all you need to buy the best preserved LPs, and quite good sound quality are American reissues of the 70s, the same Monarch presses, as well as the first Japanese editions, which have both the envelope and the vinyl itself of excellent quality by themselves. At the same time, the Japanese editions included the lyrics, and the first album was released in a gatefold sleeve (original Nippon Grammophon green / light blue label).