^ Yep, this one is generally considered to be their best, and rightly so imo, on account of Who do you love and Calvary.

Partly because of the line-up changes in the OP, I find the rest of their stuff to be a bit patchy. A while ago I did find some live tracks on the internet (San Francisco, 1973), which are pretty good in terms of good-rocking musicianship, although there is a price to be paid; you have to tolerate the lead vocalist; latecomer who seems to think he is not only the band's main attraction, but also the hippest dude in California. Well, that was the impression he gave me, anyway.