Speakers positionning

Uh, we’ve already established many folks get good results with toe in. That’s beside the point. It all comes down to what you’re trying to achieve and how far you’re willing to go. 

Elizabeth,  How far apart are your 20.7’s inside edges?

Another factor to consider is the space between the speakers.  In general, the farther apart the are, the more toe in may be needed.  Hard to imagine, for instance, that speakers 12 feet apart sound their best with no toe in.  Each of us has their own preference for sound.  Some may prefer to be totally in the speakers direct sound field, others prefer the sound of their room's reflections.  All good ideas here to experiment with.

The best test in your own room with your own system is your own ears. Although I find that bromide quite irritating, it's true. But there are tools to help one calibrate. My speakers sound best with no toe in at all, according to the manufacturer, but my room is not a Rorschach pattern. That is to say there is no right/left symmetry. Nor is my hearing equal in both ears.

The best tool I've found is the Isotek set up CD.
http://fatwyre.com/isotek-ultimate-system-setup-cd
https://www.musicdirect.com/accessories/IsoTek---Ultimate-System-Set-Up-Disc-CD

After using the CD, My soundstage is wider, higher, deeper and more precise. It took a few hours, but I wound up with my speakers CLOSER to the front wall and toed-in very slightly and my listening chair moved closer.  The first time I used it, the CD led me to have my Left speaker toed OUT slightly and the Right toed in severely. It sounded a lot better than before; but it didn't sit well with me so I used the CD to help me arrange furniture and then the speakers again. Now it sounds even better.  I re-use the CD every time things change in the room.

Speaking of distance between speakers, it’s a common misconception that wider apart is generally better. As fate would have it most speakers should actually be placed closer together than they are. Check it out. Once you overlook the closer together position you will never find the optimum position, which depends on many factors. Do the math.