Try also to get the Schumann Piano Quintet (arguably the first truly great work for that medium) and the Piano Quintet by Florent Schmitt (which is dedicated to Fauré), one of the great monuments of French chamber music for piano and strings. Look out also for the piano trio of Ravel, the second piano trio of Bridge and the Tchaikovsky piano trio.
Best,
Alistair
Don't let Thal hear you sweet-talking about Schumann.

I know it's probably floating in your toilet, Thal. Could you please possibly retrieve it, dry it and post a scan?
I'd love the Schmitt, Tchaik, and Bridge. I have the Ravel already. As well as both the Brahms F minor and the Schubert 'Trout' quintet.
Also, as Jre stated, there is no need for the Medtner Quintet, nor, thanks to IMSLP, for the Scharwenka No.2, though I still want No.1. Also, I'd appreciate the Brahms Trio No.2 and the Op.posth. in A major.
Actually, let me fix my wish list: (I would modify it but then the rest of the conversation wouldn't make sense)
Scharwenka Piano Trio No.1
Brahms Piano Trios No.1 in B major, No.2 in C major, Op.posth. No.4 in A major
Schumann Piano Quintet
Faure Piano Quintets Nos.1 and 2
Bridge Piano Trio No.2
Schmitt Piano Quintet
Any Beethoven or Brahms String Quartets
Schubert's 'Death and the Maiden' String Quartet 
I know it's a lot. Maybe someone else besides Thal has some of these.
Phil