As a confirmed Mozartian, my perspective may not be the best, but I'm surprised that Sinfonia Concertante would be a difficult piece to warm up to. I've always thought of it as one of his most immediately attractive--the opening is kind of bland, but afterwards there's a succession of beautiful melodies. The second movement is not only beautiful, but has an intensity of emotion bordering on the Romantic. But it can be a tricky work in performance: you need soloists with a lot of spirit who have the discipline not to go over the top. The Szell recording has a high reputation, but the tempi in the outer movements are a bit too fast for me. The one I like the best is an old Vanguard recording with Josef Suk as one of the soloists, also conducting his own chamber orchestra. It's a very straightforward classicist reading, but gets all the emotional nuances right. If you like old-fashioned romantic-style Mozart, I'd go for the Perlman/Zuckerman/Mehta recording on DGG--it's a live performance, very exciting, lots of virtuoso spirit. I don't know the Heifetz/Primrose version; I guess that's just one more thing to listen to... Peter Goldstein