I would agree with soliloquy, Grieg A minor...
Are you playing the whole concerto or just 1 movement? Off the top of my head, the 1st movement of Rachmaninov concerto no. 2 is probably on par with that of Saint-Saens Concerto no. 2 in terms of difficulty, and maybe more satisfying musically.
Beethoven 3Mendelssohn 1
Brahms 1?Big, but not as big as Brahms 2
I second LVB 3. Great piece.
How about Poulenc? A lovely piece and not heard enough.
Hummel A Minor?
Ravel?
Haha, Ravels Concerto is the weirdest Piano Concerto I've ever heard! lol
take alook at john fields concertos, abseloutly delightfull concertosthey'r a bit challenging but not very dificult.
i second hummel a minor concerto, i don't think it's very hard for i have read it and didn't find anything unmanagable in it.
Rubinstein wrote some gorgeous concerti. The most famous is No. 4 in d minor, which Music Minus One sells with an included orchestral accompaniment CD. It isn't terribly difficult, though it certainly presents some rather difficult challenges, but in the end it's well worth it.
Seconded! This piece is truly amazing, with it's mysterious first movement, and very witty 2nd movement. Another suggestion would be the 2nd movement of the Saint-Saens 5th concerto.
poulenc thirded (is that a word? )