I demoed B&W 803's and the 3A Sigs, and the Sigs easily came out on top. You can also add a pair of Vandersteen subs, and end up with a setup close to the 5A at a much lower price. The B&W's were too bright and fatiguing.
My room is 20x24 with 15' ceilings and the 3A's worked well.
Good luck.
My room is 20x24 with 15' ceilings and the 3A's worked well.
Good luck.