Whatever the recording industry may try to tell you, there is rarely any such thing as a single “best” among today’s pianists. We’ve had Benjamin Grosvenor and Leif Ove Andsnes, excellent artists both, touted as a cut above the rest. But hearing pianists in all corners of the world, you realize how much phenomenal and ungradable talent there is out there.

It took just two bars of Debussy's La plus que lente for Stephen Hough to transport the entire Royal Festival Hall to Paris. The nearest thing the French composer ever wrote to a café waltz – inspired by a gypsy band in a local hotel – this bewitching, louche yet elusive little piece might in other hands make a more suitable encore than opener.

This morning, those who follow ballet on both sides of the Atlantic might be feeling a bit like the male soloists at the beginning of Ashton’s Scènes de Ballet: turning their heads sharply, almost pantomimically, from side to side. Over there, in New York, Wendy Whelan, the prima ballerina retiring after a 30-year career with City Ballet, made her farewell in a programme heavy on modern masters Wheeldon and Ratmansky, including a world première.

Daniil Trifonov, 23, has shot to prominence as one of the hottest pianistic properties of the moment. With multiple competition wins behind him, including the Tchaikovsky in his native Russia, plus a recording contract with DG and a frenetic globe-trotting schedule, he is now a very busy young man. Last night’s London appearance was his recital debut at the Royal Festival Hall, a venue only accorded to the biggest names in the Southbank Centre’s International Piano Series, the new season of which he was opening.

After the enervating excesses of Salome and Elektra at the weekend, the abundance of notes at the Proms continued in a piano recital and an orchestral showstopper, but this time with built-in air conditioning. After all, both 22-year-old Benjamin Grosvenor and septuagenarian Charles Dutoit are absolutely in control of the colours they make, very occasionally too much so. But it was a rainbow-hued day inside the Cadogan and Royal Albert Halls, culminating in a spectacular and perhaps unrepeatable Respighi triple bill of Roman impressions.

“That,” she said, “is what it must be like when you enter heaven.” And I knew just what my wife meant. The organ was in full regalia, revelling in the marshmallow glory of the chorale theme in Saint-Saëns’ Third Symphony, with the orchestra trumpeting behind. The Royal Albert Hall itself proved pretty impressive, even when the gentleman in the row in front spent most of Franck’s Symphonic Variations eating a tub of ice cream.

The Dream has at its heart a great partnership. Not just the original, magical pairing of Anthony Dowell and Antoinette Sibley, for whom Frederick Ashton created the ballet fifty years ago (thereby launching one of the top couples in ballet history), but the partnership of Titania and Oberon themselves. Regal, fickle, fast, flighty, and dangerous, these two are equals as lovers and as rulers: it is their quarrel that starts the story and their smouldering reunion that brings it to a happy conclusion.

A voluptuous dream in sequined silver, the nearly-27-year-old Georgian pianist Khatia Buniatishvili sat down at the keyboard and instantly transcendentalised her mermaid look as Ravel’s Ondine. Even Brahms took to the life aquatic of her recital’s first half. For the second, though, there should have been a costume change into a clown suit with a tatty tutu pulled over it.

This concert brought to a close the London Symphony Orchestra's focus on Scriabin, in a series appropriately titled "Music in colour". The Third Symphony was partnered here with Messiaen’s early work Les offrandes oubliées and Chopin’s Second Piano Concerto – both in their own way richly colouristic works.