The Lydians also have an interesting way with Handel's Messiah. This performance might not be the last word in accuracy, but seems to me a hundred times preferable to anaemic authenticism. The visual element helps too...
For anyone wondering about the less-favoured of Gluck's two Iphigénie operas, here are extracts from a Rome performance conducted by the composer's greatest living interpreter, Riccardo Muti:
And finally, here is the greatest (recorded) conductor of them all, performing the overture in properly Wagnerian fashion (audio only, but who needs to see anything when hearing a performance of this intensity?)