DVDs for a desert island

The list author says:
	"Bernstein's is probably the finest single Mahler cycle available.  The performances of symphonies 7, 8 and 9 are stupendous, and so is much else in this set."

The list author says:
	"One of the great operas of the 20th century at last on DVD"

The list author says:
	"Wagner's last opera in a wonderful performance from Bayreuth"

The list author says:
	"High voltage Strauss from Abbado and the Vienna State Opera"

The list author says:
	"Wagner's Ring in a visually and musically satisfying production"

The list author says:
	"A wonderfully warm and moving Meistersinger from the Met"

The list author says:
	"A near perfect version of Berg's opera"

The list author says:
	"A terrific Lohengrin, despite the gloomy staging"