I would not play Brahms Rhapsody no. 2... it's quite overplayed and personally I don't like that piece. Although the Chopin is overplayed as well, I find it much more interesting. The Grieg concerto might not be such a good idea since it requires an accompanist but if your willing to pay for one, or have a friend who could accompany you (or even better an orchestra, but that's quite costly), go for it. I would definitely not play Grieg AND Chopin. Both are too similarily showy.
Scott is right, you need some more variety. I would recommend a Baroque or Classical piece. Maybe both? Possibly lose some of the Rachmaninoff as well, since playing all 3 is a bit much. I would go with Moment Musicaux 3 and 4 since they provide nice contrast with each other.
I would consider a Scarlatti Sonata or a Bach prelude and fugue or partita, or some other Baroque work.
As well as possibly a Mozart, Haydn, or Beethoven Sonata.