help choosing a new piece

Could you help me please? I'm on vacation, but I'd like to continue improving my level. My teacher told me to polish what I worked on during the semester, and I plan to do that, but I also want to work on an ambitious piece to improve my fluency and speed. This semester I worked on Bach's Invention No. 14, Haydn's Hob. 37 Sonata (not as fast as I should be, but decent for now), Chopin's Farewell Waltz, and a Czerny study with fast right-hand arpeggios, Op. 636 No. 7. I've also played Bach's Invention No. 8 and Bach's Prelude No. 2 in C minor, as well as the first two Czerny studies from the Speed ​​Book (not as fast, but decent). I was thinking of learning Moszkowski's Étude Op. 72 No. 6. I know it's difficult, but I thought that if I work on it slowly and gradually, I could manage it. What do you think? Do you recommend another piece? And if so, which one? Thank you very much.