I saw the 1960 version various times on TV and wasn't crazy about it. Martin was no longer playing the role as if she were a teenage boy. She was more like Maria von Trapp. My recollection also is that it was a little shorter than the '55 and '56 versions. Right now I'm very happy with the Blu-Rays of the earlier versions (which are much improved over the VHS tape of the '55 production).
I agree with you about how good the Blu-Ray of the '57 TV version of Annie Get Your Gun looks. I remember renting the VHS tape of it years ago in the late 70's and was disappointed how grainy it was.