I have found that my NX-Oticas are not that sensitive to placement as long as they are a good distance from the front wall. Unlike normal box speakers where tiny position changes were noticeable, the NX-Oticas are fairly flexible. They are more sensitive to room treatments than they are to exact placement.
I've got mine set up with a modest toe-in (converging a few feet behind the listening position), about 9ft apart, with ~7ft from the front of the baffle to the front wall. My seating position varies from 9ft (e.g. equilateral) to 12ft from the speakers. The sound stage is definitely wider if you get closer, but I personally like to sit a bit farther back. With large diffusors behind the speakers, they have a great sound stage either way.