Livin,
I have an office system in a room only slightly larger than yours (15 x 11). The speakers are Vandy 2Cis and I have them centered on the long wall about 18" out and 7 ft. apart. They work wonderfully well with a good sound stage and excellent low end. I know because I used to have them in a large (18 x 33) room and got very well acquainted with their sound. Any chance you could try them on the long wall?
I have an office system in a room only slightly larger than yours (15 x 11). The speakers are Vandy 2Cis and I have them centered on the long wall about 18" out and 7 ft. apart. They work wonderfully well with a good sound stage and excellent low end. I know because I used to have them in a large (18 x 33) room and got very well acquainted with their sound. Any chance you could try them on the long wall?