I think tomorrow night's prom (Dunedin Consort, John Butt, Mozart, Bach) is probably my pick of this year's bunch. Mozart's C minor mass is, I think, his best choral work, and the soprano solo, where she sings Christe Eleison, is sublime, a soaringly glorious melody which is actually a big challenge to many sopranos because she starts so low. Wolfgang wrote it for his wife, Constanze, who had a big range.