The Appaloosa (1966)
Chosen by Lauren Parker who supplied the dvd but hadn't actually seen it so no intro. Slacker.
A mostly solid if unremarkable western. Brando is ok here, seemingly doing a dry run of his mumbly Godfather voice (or he's just bored by the whole thing) and John Saxon is great as a villainous Mexican.
The plot is straightforward almost to the point of nothingness (I just want to get my horse back) but has a couple of interesting wrinkles.