No I have not had the privilege so far. Have you Knghfi? If so what do you think?I don't but a friend I trust recommends King Sound King MKIII ONLY with VAC power supply if ever in market for planars. He has heard and owned them all. He can't decide on one type of speaker so owns 4 or 5 different types.
I do have experience with Martin Logans and find them sound best with tubes. Still remember my 1st experience with all CJ playing Paul Simon Graceland, the Homeless track. I felt I was on the stage with the performers. Unbelievable!