I’m going to bite the bullet here and suggest that there are few records that can put a guitar power trio into the room with the immediacy of the second track on side one, entitled “I Don’t Know.”
This was power rock at its best, and the guitar work is only part of the story; the band was held together by Tony Newman, a well-known drummer who went on to work with Jeff Beck and a long list of name-brand talent.
I think the original UK Vertigo is the one to buy, and you may find one on the cheaper side of expensive if you are willing to suffer a tatty cover, a missing swirl inner liner or some other collector ‘negative’ that brings down the price. I gather than the U.S. pressing on Paramount is bass-heavy and doesn’t have the open high frequencies and harmonics of the Vertigo, but that’s based on anecdotal comments from other listeners, rather than a first-hand comparison by me. The album was also released by Vertigo in other territories outside of the UK, including Germany and France, among other countries, which means that they will typically be less costly but again, I have not been able to directly compare those contemporaneous pressings with the original UK pressing. Their second Vertigo album, “2nd of May” is now, at least as a UK first pressing, in hedge fund investment territory and not so easy to find (so if you see it in a bin, or online at a reasonable price, grab it! For what it’s worth the contemporaneous German pressing of 2nd of May seems to be far cheaper than the original UK, so that may be another route). In the meantime, hunt down the self-titled album. These guys delivered a powerful, punchy record which, if not quite to the musical level of Cream’s “Disraeli Gears” or Hendrix’ “Are You Experienced,” far exceeds both in sonics.