If you are in Stockholm in August, why not try out the fantastic court theatre Confidencen, just a short tuberide from Stockholm center.
You can enjoy Gluck's masterpiece "Orfeus and Eurydike" with candle lights on stage like in the 18th century, not the usual spotligts we are used to. Very beautiful Calssicalify thinks, who saw this performance some years ago.
It's played August 14-29. Karolina Blixt sings an incredible Orfeus! Arnold Östman is conducting.
More info on Confidencen homepage: