What should be considered when creating a program for a concert? Should a theme be chosen (all atonal, all soft, slow peices) or should you demonstrate a clear ability in all areas (Romantic, Baroque, Classical), should you showcase a certain composer, a certain era of composers, one composer, and then peices that were influenced by that composer?

I may give a recital in a month or so, and I don't know how to go about play the piano portion of it.
So far it is:

Yellow After the Rain - Peters
Rain Dance - Gomez
Waves - Peters (marimba)
Clarinet Concerto No.1 mvt3 - von Weber (clarinet)
Tornado - Markovitch (snare)
-intermission-
*Mozart's Amajor concerto for piano K.414
*A chopin Nocturne
*Mozart violin Sonata (Piano)
*Something by an American composer composed after 1940

The starred things are tentative, I need them on video as an application to a competition I'm thinking of entering.
Also, would you recommend something by an American composer composed after 1940? (I suppose 4'33 would be a bit gutsy?)

Thanks

Dance Scherzo (1969) by Denes Agay?

He's a Hungarian Composer who moved to the United States during the early 1900's, as I learned from a recent discussion.