I'm lucky to have seen many cups and balls performers
Al Scnneider has a superb, magical and easy to follow cups and balls routine.
Michael Ammar lectured in Ireland a few years ago. I always liked his routine but he had recently completed a long run of layman performances and it put a high polish on his performance.
Who can forget Tommy Wonder's two cup and ball routine?
When I was twelve I saw Dick Richards (from Cardiff in Wales) perform at the Butlin's holiday camp in Ireland. He did a stage version of the cups and balls that must have lasted ten minutes. The balls changed colour, grew and became multi-coloured giant balls. I beleive he once won the manipulation award at the British Ring Shield competition with this act. I wish I could remember more of it. I do know the theatre was full (about 800), mostly children and he held their attention throughout. He was also the only magician I've seen where he held the ball at his fingertips, displaying it to the audience and it just vanished without any cover or moves.
The fifth and final must be Prince Charles' cups and balls which he performed at the Magic Circle when he was made a member back in the seventies. Or more so, what happened backstage. He set up backstage, putting the loads into his pockets before turning to the stage manager, looking him straight in the eye and asking, "Do any of my balls show?"