Hey, folks!

Not many pieces for these grades that I'm familiar with, apart from (off the top of my head) Saint Saens, David, and Curnow.

Any good ones?

I've accompanied the Senaille Allegro Spirituoso on Gd7, the Curnow (which you mention). From Gd8, the Saint-saens and the Guilmant Morceau symphonique. I know this is from an accompanist's point of view, but all were enjoyable to listen to and perform; my soloists seemed to enjoy them too, which is perhaps more important from your perspective.