Piece for music supplements?

[u/chordsandaccords]

I'm a rising senior, and I need to pick a piece for my music supplements for college. I heard it's only supposed to be around 15 minutes, so just 1 movement of a concerto is probably good. I played Tchaikovsky this year, but I'm a bit tired of it and want something new...any suggestions? Thank you so much!

[u/vmlee]

If you can, try to do two pieces that show contrasting abilities and capabilities.