I've heard Ayre paired very successfully with Vienna Acoustics. A store owner even drove a pair of Liszts with the 60w integrated, so show it would work. I've listened to Liszts, Concert and Baby Grands, and for me the Concerts somehow don't have the magic of the other two models.
All that being said, with that sensitivity, you could easily drive them with the Pass XA25--that might well be the cure for your woes.