Mitch,
What did you settle on? I was going to put for your consideration some KEF Q900s all around - should be in a similar price range as the Bose. However, I thought Martykl offered better advice on the Mirage although I have not heard them. With your space, wide dispersion speakers almost de rigueur for your room and budget - a 34,000 cu ft room is quite a space. How may tube amps are you using to heat it in the winter?