I was just about to post a question regarding recommended speakers for a room about this size, so I'm glad I found this thread!

I'm going to be running Zone 2 audio to my "library" room, so it'll be 2.0. The room itself is about 11 x 12 if I remember right, with a vaulted ceiling. Completely enclosed, aside from one wall being pretty much entirely window. The seating position is about 5 ft. away.

I was leaning towards the 5Bs on stands, but I was curious as to whether or not the 4Ts would be a possibility... looks like I may have something else to consider.