Dear Walking:
I have to somewhat agree with Phil: you seem to be able to play a huge amount of repertory, given yours current one. However, I have a comment: I think that you miss a bit of focus. You have a handful of
etudes, some
tour-de-force pieces, but it looks hard to extract two different recitals from what you have. Three suggestions:
- a multi-movement work (sonata/suite) would fit nicely a program, giving some balance to stand-alone and shorter pieces. Personally, I would choose a Beethoven's Sonata;
- some non-Chopin 19th century music, and/or non-russian 20th. It's hard to suggest something, because there are lots of possibilities, but maybe some Liszt or Brahms (sometimes I can be so conservative...

). About 20th century, why not some french music (Debussy, Ravel), or German (Hindemith, Berg, Webern)?
- a less known work.
Writing the above, it occurs me that another interesting choice is to focus on one composer or style. Looking at your repertory, an obvious option would be an all-Chopin recital: if you have the four ballades, you don't need much else...

But there are countless alternatives, just trust your taste (late-19th/early-20th russian music is just one).
Best!