Since there don't seem to be any new recordings of them coming out soon, I think this is the appropriate wing of the forum to discuss them. All 4 have been recorded, plus the early Concertino, Op. 33. As Eric has mentioned, the final work is extremely compact, and I find its string-heavy orchestration a bit lackadaisical, certainly less deft than that of the roughly contemporary flute concerto. The first PC, as has been pointed out, has been recorded no less than 3 times to my knowledge (Robbins, Ponti, Hellwig). The second has two recordings (Robbins, Hellwig), and Hellwig alone has recorded the other two full-scale concertos on a box set of all 4 from cpo. There are one or two recordings of the Concertino (or is it Konzertstück?), I forget exactly how many. I wanted to pick one up, but now I can't remember the label. Some on this forum have previously expressed a dislike for these works, but to me they exemplify the best of high Romanticism, especially the criminally neglected 3rd, which I consider the best of the lot, as does Alan. Feedback, anyone?