Probably getting to play a piano concerto with a smaller orchestra. But which?

Judith Weir has a very nice piano concerto for piano and string ensemble (from as little as five to as many as a full string orchestra). Although Weir is contemporary, I think you will find her music quite enjoyable and "easy to listen", as opposed to, say, Ferneyhough.

I have a recording of it, if you'd like to give it a listen, and they played some of her pieces here a few months ago (including the concerto), so we should have the score around here. And someone there could arrange it for the ensemble you have there, if you like.