My enthusiastic recommendations:
Symphony no. 4 by Kent Nagano/Deutches Sym. Orchester Berlin on Harmonia Mundi: the most beautiful performance of this piece I have heard. Not a no-holds-barred performance like C. Kleiber's, but just gorgeous. Very good sound.
2nd Piano Concerto by Marc Hamelin/Litton/Dallas on Hyperion. Not as exciting as Stephen Hough (below), but beautiful,lyrical playing by Hamelin. SACD
1st and 2nd Piano Concertos by Stephen Hough/Andrew Davis/BBC Orch. on Virgin. A mid-priced CD with wonderful performances, very exiting. Good if not great sound.
Serenade no. 1 and Haydn Variations by Vernon Handley/Ulster Orch. on Chandos. My favorite performances of both works. Good, if distant back-of-the-hall Chandos sound.
And now some chamber stuff (which is main reason I love Brahms):
Piano Trios 1 and 2 by Storioni Trio on Pentatone. SACD
Beautiful playing/sound. Less intense than the Fontenay.
Piano Quintet by Prazak Qt./Ivan Klansky on Praga SACD. Would be hard to find better performances and impossible to find better sound ;-)
Clarinet Quintet by Pascal Moragues/Prazak Qt. SACD. Ditto above.
String Sextets 1 and 2:
a) by the Acadamy of St. Martin-Outstanding-in His -Field Ensemble on Chandos. Not exciting/intense as b) below, but beautiful,beautiful. Very good 1990's rbcd sound.
b) by Raphael Ensemble on Hyperion. More exiting/less beautiful playing than a). Sound is good, but not as good as a).
Note: all SACD's listed above are hybrid, so you don't need an SACD player for them. The rbcd layer on them sounds terrific.
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I'm still looking for excellent performances of the Piano Quartets in real good sound. I'm close to pulling the trigger on Hamelin, et. al. on Hyperion. Anybody heard those?
Steve O.