Hello,
My teacher said that before the end of vacations, I should choose some big romantic piece, about 8-20 min long. Technical difficulty shouldnt be an issue at all. Chopin Barcarolle and Dante sonata come to my mind first, but you know, one might always forget some pieces in all the stuff. Could you throw in some tip ?
My current work for holiday is the Beethoven d minor sonata, 6th hungarian rhapsody, Chopin 25/12 + 25/6, Rach g# prelude and Bach WTC1 B flat major so far.