Penderecki: Dies Irae, Polymorphia, De Natura Sonoris; performed by the Cracow Philharmonia Orchestra, Chorus, conducted by Czyz, with soloists Woytowicz, Ochman, Ladysz(Philips PHS 900 184, M7/1). Really powerful and interesting music. It's an excellent recording, but unfortunately my copy's in very rough shape.
Stravinsky: Concerto for Piano and Wind Instruments, Capriccio for Piano and Orchestra; performed by the L'Orchestre da la Suisse Romande, conducted by Ansermet, with soloist Magaloff (London STS 15048, Orange-silver label; reissue of CS 6035, no SXL pressing). Old Ernie does a great job on this record--at least I think so, since I'm no expert. One thing's for sure: soundwise, it's pretty much a demostration disc. I'd love to hear the original CS, but it's hard to imagine it would be significantly better than this STS.