I discovered Genesis with the release of the Abacab album, and Three Sides Live was their first album i bought on release day after having anxiously waited for it to be out in the shops.
It still remains my favourite live Genesis album.
I bought the european edition and in that pre-internet days i didn't know the 1980 songs were Duke b-sides, just as i didn't know the Abacab outtakes had been already released as an EP in the UK the month before. That european studio 4th side really caught my attention. It was so good.
Now, 40 years later, i still listen to Three Sides Live from time to time. I always put on an early W. Germany cd edition (fatbox) which has great dynamics and it reproduces the sound just like i remember it on my old 2LP italian pressing.
I avoid the 2008 remix. Too much compression.
I just wish they originally included the Dance On A Volcano/Los Endos medley, which fortunately is available on various King Biscuit Flower Hour / Westwood One radio shows. It's the last time they performed that medley on tour and the Nassau Coliseum performance (Three Sides Live outtake) is outstanding.