I think my favourite has to be The Orb live @ Glastonbury 1993 it was a good experience for me there & then – and I enjoyed hearing some of the set again on the LP Orb Live'93 or on the tape I sernedipitously recored off Radio 1 not long afterwards
Mind you Orbital played the following year, and the live Gasto compoliation album releeased awile back inspires too