I've been nothing but impressed with my Kowa's.
They don't seem to give up much compared to the Swaro's I've looked through. Perhaps edge to edge clarity is a bit better on the Swaro's.
Honestly the differences once you get to this tier in optics is small nuances. For some those small nuances are appreciable, for others not as much. That's subjective to individual eyes and preferences.
The Kowa's are a tremendous deal if you can snag an open box special from CameralandNY. Can't say I've looked through the other binos you are considering, so nothing to offer up from a comparison point of view.
Meopta's are always a fan favorite - 99% the performance of Swaro's but at a bit of a savings, though Meopta's prices have recently increased. I need to get a pair of 15x56's, and the Meopta's are high on the list.
Good luck! Lots of great options to sort through, hard to make a bad choice.