Everyone - thank you so much for your comments. I've re-measured my space and the distance from the front wall and the back of the speakers would be 18 inches. I really don't want to use any room treatment panels, etc. nor DSP.
JJss49 - thank you for the WASP link --- very informative.
Gpgr4blu - Is there any way I could speak with you about your setup? You have the experience of using the Wilson's in a Manhattan apartment.
Many thanks -
Newton