
You're playing BOTH those schubert sonatas? Back to back?! That's quite a bit for a "small concert in a parish" public to put up with. They're even in the same key! Why can't you do some of the impromptus or moments musicaux instead of one of those sonatas? I would go for the D.664. I don't know. Mozart - Beethoven - Schubert - You can't get much more classical then that. What is the extra piece for? An encore? I can't see any of those pieces serving for anything else - certainly not in the programme you've mentioned. You have all sonatas - that, in itself, is very limiting. Not even Kempff ever played such a programme, unless it was part of a Beethoven cycle, or something.
I'm curious. How are you ordering your programme? At any rate, if the "extra number" you're referring to is an encore, stick with Schubert, mozart (not the fantasy - maybe the "alla turca")or Beethoven.