There isn't a lot of info about those but they appear to be more like DIPOLE and try to make the surround field very diffuse. If you have them already I would try them. I'm not sure I would spend much money on them. But I haven't heard them. I am just going by how they are described.
Well, that’s even better. On average Infinity makes more reliably consistent, and accurate, speakers across their product line then does Polk, based on standardized testing of speaker accuracy.
Those can definitely work VERY WELL for such a situation. Their wide dispersion tends to create less hot spotting, but they are still "directional" enough to maintain coherence.
(DO NOT use DI-pole speakers.)
Yeah closer to ear height is ideal. But as you note being right up against the couch is not great (because it will "hot spot" and possibly be distracting) but if you do that, simply point them at each other and not at the seats, and keep the level low if you get distracted by them, and it can...
Home theater, even in dedicated rooms costing hundred of thousands of dollars, is all about intelligent compromises.
In this case, buying the larger TV and shifting it to the left to fit makes the most sense. The 97" TCL is a leading choice and probably the best value.
If your budget for...