LOUNDSPEAKER FOR $10,000.00 PER PAIR

Wow, that is such a hotly contested price point! Your list so far is great.

I’d add:
New Magico A3, Used Sonus Faber Olympical III(actually available around $7K, and great for your symphony sound stage requirement),
Legacy Audio Focus SE, Used Rockport Technologies Atria(stretch budget to $12K), B&W 804D3, Used Revel Ultima Salon II(stretch budget to $11K)

Am setup to reproduce large orchestral works with stunning accuracy/soundstage and use Tekton speakers. The Ulfberht is available a simple black version for 9k. If you can handle the size and utilitarian design, it will accomplish your goals in spades. Throw a great deal of clean power to it and you're in the concert hall. You'll get a lot of negative feedback here about Tekton speakers but listen to owners -- they tell the true story.

GE Triton Reference. There is a pair selling on Audiogon, brand new for $6500.00. It’s a steal at that price.

+1 for the Legacy Audio Focus SE recommendation. You can usually find them used for roughly $7K.