Symphonic Variations
The D'Indy "Symphony" (really a piano concerto in all but  name) used to be an extremely popular piece, but it seems to have disappeared  entirely from concert programs. A couple of years ago, I talked a community  orchestra into agreeing to play it, and we found a pianist--a hot-shot virtuoso,  who agreed to do it as a "favor" since he would have preferred a  "real concerto." Well, he waited until just before the concert before  looking at the score, only to discover that he couldn't learn the music in time!  We did find a substitute, but the point is that this is a more technically  challenging (and musically rewarding) work than many more famous pieces, so if  you like piano concertos, you'll want both this piece, as well as this smashing,  budget-priced recording of it.--David Hurwitz