Fred, construction of the room is just as important as the dimensions, wall materials, floor, windows, furnishings, etc. all come into play irrespective of size. I've done a lot of near field installations of large speakers in small, difficult rooms like yours with excellent results and there have been a couple of occasions that rooms with seemingly ideal dimensions turned out to be nightmares because of their construction. More information is needed for any kind of suggestion, even then without being there physically it will be all guess work, but it might be enough to get you going with your setup.
If your aim is specifically better soundstage and image the key factors are speaker positioning and low frequencies. Bass is the foundation that will give you the solid 3d imaging. Bass is also the hardest thing to get right in almost every room, even large ones.I don't know your level of experience with speaker positioning and system installation, that plays into what you should buy. I'm not familiar enough with any of AN speakers to make a recommendation but I would always pick the one with best bass reproduction capabilities.
If your aim is specifically better soundstage and image the key factors are speaker positioning and low frequencies. Bass is the foundation that will give you the solid 3d imaging. Bass is also the hardest thing to get right in almost every room, even large ones.I don't know your level of experience with speaker positioning and system installation, that plays into what you should buy. I'm not familiar enough with any of AN speakers to make a recommendation but I would always pick the one with best bass reproduction capabilities.