What little I've heard of the Hagen Quartett I quite like (Debussy, Ravel, Beethoven, Shostakovich). I actually prefer their recordings over what the Emerson Quartet has done (especially Shostakovich's 8th 4tet). What I can't get by the Hagen, I tend to go with the Emerson-- I always keep an eye out for them.

And I like the Kronos Quartet as well, though sometimes I feel like some albums of theirs can be a bit hit-and-miss IMO.

~josh

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"There is no theory. You have only to listen. Pleasure is the law.” ~ Claude Debussy