Since there have been a number of string concertos mentioned in this thread, I figured I'd recommend something a bit different:
Tuba Concerto by Edward Gregson - John Fletcher on Tuba with the Besses o' th' Barn Band (Chandos Label 1982 Recording)
It's a great piece, fun, upbeat, with some jazz influence especially in the third movement. The recording sticks the soloist far to the left of the soundstage, which is a bit odd, but maybe that's where he was standing when they recorded it. It's the original ensemble and soloist the piece was commissioned for though, and most of the other recordings are orchestrations for full wind ensemble or orchestra instead of the original brass band as accompaniment.
Tuba Concerto by Edward Gregson - John Fletcher on Tuba with the Besses o' th' Barn Band (Chandos Label 1982 Recording)
It's a great piece, fun, upbeat, with some jazz influence especially in the third movement. The recording sticks the soloist far to the left of the soundstage, which is a bit odd, but maybe that's where he was standing when they recorded it. It's the original ensemble and soloist the piece was commissioned for though, and most of the other recordings are orchestrations for full wind ensemble or orchestra instead of the original brass band as accompaniment.