Your room is pretty close to the golden ratio with 18/12= 1.64 (golden ratio is 1.618). It might not be quite a Golden Cuboid listening room, since I don't know the room height, but take a look at
http://www.cardas.com/insights/index.html
I would go for the near field listening stup shown in diagram C, which is a combination of diagrams A and B. This should be a good starting point. Your room is about the same size as mine. I have my room setup this way with some small Mission 751 monitors. I get an excellent sound stage. It might look a lttle funny at first with the speakers that far out and that close to you, but once you put on some music you're hooked. Also for good sound you want to sit not that close to a back wall (just as shown in diagram C)
Good luck.
Rene
http://www.cardas.com/insights/index.html
I would go for the near field listening stup shown in diagram C, which is a combination of diagrams A and B. This should be a good starting point. Your room is about the same size as mine. I have my room setup this way with some small Mission 751 monitors. I get an excellent sound stage. It might look a lttle funny at first with the speakers that far out and that close to you, but once you put on some music you're hooked. Also for good sound you want to sit not that close to a back wall (just as shown in diagram C)
Good luck.
Rene