Hi Jon...

Quite a drop in volume.....is this a dedicated listening room? I agree, a large room is preferable when choosing loudspeakers and a small one tends to preclude the choice of large floorstanders - like the BR6 - which would overwhelm the room.

Most floorstanders like to be positioned well away from corners. Unfortunately this reduces the usable area of the room even further. You're ideal situation in a room of this size may be to swap the BR6 for a wall-compensated Bookshelf model positioned hard into the corner of the room - which gives more freedom for the listening position. For music purposes as well as HC, I've used rear speakers (bookshelf types whose range tails off above 50/60Hz)) pushed hard into the corners for the last 10 yrs and the sound is very acceptable...

If this is a dedicated room another thing to look at is a small amount of damping?  If you have a window to one side consider a long curtain rail that spans the entire wall and use heavy floor to ceiling drapes. These will help tame the room without turning your room into an acoustic laboratory. (Better still if the window is between the speakers as then you can create symmetry.)

A carpet on the floor will also help - or if solid floor, a large rug between you and the speakers.  If possible, I would try for a listening position at least 2ft from the rear wall. The wall behind your ears would benefit from modest damping too. Stopping early reflection off the back wall will be a big help. See -

http://www.soundprooffoam.com/soft-sound-acoustic-panels.html?section=image

I've only posted this as an example only. These pads are quite cosmetic and look fairly artistic.

Hope some of these suggestions prove helpful.

Kind regards....Bill.