I would get some Ohm Walsh 3000's. The bigger Ohms would better fill your large room with their omni sound.
I have a pair of 2000's for a much smaller room, 15x13, and they do a great job. I love how they fill the room with soundstage and you need not be seated in a sweet spot. This is a huge advantage. I have a pair of Magnepan LRS in a smaller room, love them, but not as 360 as the Ohm Walsh's for sure. Good luck!