Beautiful Classical Smaller Pieces, duo,trio,etc

Ptss,
Great thread Idea. Many worthwhile suggestions are/will come out of this.

With my own ears I heard the great pianist,Arthur Rubenstein, say the Schubert Op 163 Quintet is the greatest piece ever written and that he wanted it played at his funeral.

My own personal favorite piece, period, is the Brahms Op 78 Violin Sonata in G major.
My favorite recording of same is the Josef Suk/Julius Katchen ,Decca 466 393-2 .

The Brahms Clarinet Quintet should be added to the list.

Schubert's Cello Quintet of course.

Of the top of my head;
Brahms Sextet No. 2 in G Major, Op. 36 (Sextet for Strings)
Beethoven's String Trios

The four albums in the Miracle series from KKV.no featuring Aage Kvalbein on Cello are magnificent. Two of them are also available on vinyl Itallian and Spanish Miracles. Highly recommended and available at KKV.no search Kvalbein

Good listening

Peter