I have read in the foorums that room size is important when choosing speakers. I have a 5 by 3 metre room and am looking to buy a system with probably B&W 685's. Would these be too big for my room do you think? They sounded ok in the demo room which ironically is smaller than my lounge. Are these speakers position friendly? Can get them around 6 inches from a back wall but that is about all and the will be up against a wall on the side.