Brownsville Station, Mott the Hoople, and Kiss? Man, this would have been my dream all-star concert from my junior high days! I grew up in Iowa, so we could see Kiss a couple of times a year, Brownsville Station when they had an album out. Never got to see Mott the Hoople, although I did see Ian Hunter after I moved to California (sadly, not the same). I am going to go spin Mott the Hoople Live now!
Worst pairing? Around 1979, when I was at college, the student government somehow managed to sponsor a show where UFO opened for The Atlanta Rhythm Section. Two great tastes that really don't go together. Somebody must have fancied themselves as a junior Bill Graham. After many years of hearing almost nothing but dull thud at Veteran's Auditorium in Des Moines, I was fairly shocked to hear some amazingly pristine PA at Maples Pavillion at Stanford for ARS. If you remember back that far, you'll remember that the bassist was a very big guy that played a Rickenbacker. The vocals and guitars at that show sounded very studio, but I remember that the bass was really clearly defined too, and that the big guy played a lot more than I expected.