So it was Rachmaninov night at the Proms, but with a difference: a trinity of works sacred and profane, the first two introduced by the Latvian choir due to perform the third singing harmonised Russian Orthodox chants of the kind on which the composer based so many of his supposedly late-romantic inspirations. That was bound to enliven a bog-standard programme of the Third Piano Concerto and the Second Symphony.

Goodness the BBC Philharmonic plays well for John Storgårds. The orchestra’s chief guest conductor has a lovely easy manner on the podium – all curved gestures and loose arms, and the result is a partnership that brings the absolute best out of the BBC’s Manchester-based orchestra.

The road to hell is paved with brilliant ideas in Berlioz's idiosyncratic take on the Faust legend.

A Prom of unrelenting momentum began promisingly with Beethoven, and the false start that opens his First Symphony. On this showing, Kirill Karabits has coached his Bournemouth musicians in the classical repertoire with a dash and flair that brings to mind a golden era for the orchestra under the stewardship of Rudolf Barshai in the 1980s.

Before reuniting us in high spirits with a pair of much-loved old friends, Mozart's Sinfonia Concertante and Brahms's Second Symphony, the Deutsche Kammerphilharmonie Bremen under Paavo Järvi at the Proms took us into a darker, and unexpectedly affecting, place.

The title of John Adams’s Naive and Sentimental Music is a bit of a tease. Read literally it promises – or threatens – unsophisticated mawkishness, though that is the last thing it delivers. But maybe it was this title, alongside relatively unfamiliar 20^th century repertoire, that kept the audience away. For whatever reason this was the worst attended main Prom I have been to for a long time – and what a shame, as it was also one of the very best.

How do you make a venerable warhorse frisk like a coltish show-pony? Hire William Christie as the trainer.

As the lights dim the choir turn their backs on the audience. A spotlight picks out a single singer. With one hand aloft he leads the male voices through the “Pater Noster” and “Ave Maria” in a stern and stately plainchant. Then suddenly the full battalion of cornetts and sackbuts, theorbos and recorders burst into the joyful opening of Monteverdi’s Vespers, and we are up and running.

Romantic concerto, contemporary work, classical symphony: it's a common format at the Proms, but not usually in that order. Both David Sawer's 1997 firework The Greatest Happiness Principle and Haydn's ever-radical Symphony No. 99, sharing a light-filled second half, would normally be reserved as what composer Anders Hillborg once told me is known in America as "parking-lot music", taking the opening slot.

Expectations ran high for this first performance of Julian Anderson’s piano concerto, and they weren’t disappointed. Taking its title from a book of the same name by Andre Malraux, The Imaginary Museum goes on a journey around the world over the course of its six movements.