Ian,
see my thread on "DVD audio (again)" By coincidence it deals with some of the same issues. Perhaps I should have added it to this thread, but somehow failed to notice it was there.

Here are some more to try:
Chanticleer, Magnificat (Teldec)
Marcello, Händel & Vivaldi: Concertos & Sinfonias (Aix)
Metallica (black album)
Sibelius/Sinding: Violin Concertos (Naxos)
Handel, Messiah (Arts)
Vivaldi: L'Estro Armonico Op.3 (Arts, on two separate dics)

If you want to hear what can be put on a single DVDA, the whole of Bach's St Matthew Passion (cond harnoncourt) (162 minutes) fits on a single Teldec disc.

Harnoncourt's recording of Dvorak's New World Symphony coupled with the Water Goblin (also Teldec) is pretty good as well, but only average running time.

There is a fair bit of Beethoven on DVDA, but none I have heard so far is remarkable. Abbado's recording of Symphonies 1 and 2 is quite good (on DG)but no doubt the DVDA of kleiber's Beethoven 5 and 7 is the one to get, if it can be found... fabulous on CD anyway.

But if were planning to show of the virtues of DVDA I would probably choose either Brothers in Arms or the Pioneer classics recording of Bach's Passacaglia and Fugue in C minor (see my other post)

michaelh