I am using Dynaudiio Contour 5.4's in my large (16x30) room, with great results. Listening is always a good experience. I have found, however, they sound their best when located 6' from back wall, and 5' from side walls in an equilateral triangle to listening position. (Measurements approximate). A great new speaker from Dynanaudio is the Sapphire, at the upper end of your price limit, but they are really special, and only a thousand will be made. If I could afford them, I would surely order a pair.
Best of luck, and enjoy,
Dan
Best of luck, and enjoy,
Dan