i agree with j_menz. Waldstein and La Campanella is a great piece, and having played both, I would say put it on your wishlist for maybe 2 years?
Some suggestions:
Liszt: Waldesrauchen
Liszt: Un Sospiro
Beethoven: Sonata op 10 no 2
Chopin: Etude op 25 no 1, 2/Any of the nocturnes(well maybe except op 48 no 1),