Having owned the 803S (and now the 803D), the 803S was as previous posters have said and could be a bit much for that size room.
Whether you decide on the 805 or 683, both contain B&W's aluminum tweeter which is a little forward imo. I found that Audioquest's CV-8 dbs speaker cables is great at 'taming' the tweeter and producing a more relaxed and less forward high end without loosing any detail.
The diamond tweeter is another story and is not forward at all imo.
Just FYI.
Also, you'll need more power to drive the 803S given the Rochell bass drivers unique to the 800 series.
Whether you decide on the 805 or 683, both contain B&W's aluminum tweeter which is a little forward imo. I found that Audioquest's CV-8 dbs speaker cables is great at 'taming' the tweeter and producing a more relaxed and less forward high end without loosing any detail.
The diamond tweeter is another story and is not forward at all imo.
Just FYI.
Also, you'll need more power to drive the 803S given the Rochell bass drivers unique to the 800 series.