Gimme Shelter is one of my very favourite Stones songs... and an official Song That Cannot Be Played Too Loud. Dread hearing it on the radio while I'm driving - should have been killed years ago!
My curious side wants to hear it live. My purist side wants to remember it from Let it Bleed, the perfect recording of the song. My curious side usually wins, tho... not always a good thing!
Second on the list would be Let it Bleed. And Around and Around, which they didn't rehearse for this leg, so guess I am beat there.
Only thing for it is to see as many shows as possible, up the odds of hearing your picks. This gets expensive. Forget Gimme Shelter - gimme a tax shelter!!!