What Piano Pieces Should I Play at my age?

Im 15, turning 16 this year and I have finished a level in my studies in piano and I was wondering what to play next. I have already played in the level of pieces such as Mozarts Piano Sonata No.15 in C major and Ernesto Lecuona's Gitanerias. Im about to tackle Chopins Etude for piano No. 5 in G flat major and a peice by Rachmaninoff...Prelude (Andante) Op. 3, No.2..What should I play at this level and next?