I'd lean 42mm if low(er) light capability is compulsory - particularly in this price range. Seems the Meopta Optika 8x42 was built to compete at the precise level you're looking. Based only on experience with other Meopta products – and feedback from others whose opinions I value, Meopta seems to always outperform the given price point it resides.
I can’t speak to Meopta bins, but I have their S2 HD spotter relabeled by Cabela’s. The glass is on par with Swarovski glass IMO, and yes, I’ve spent hours looking through Swarovski glass as well.
I can’t imagine their binoculars would suck. I’d go with Skane’s suggestion. 😎
Curiosity Killed the Cat & The Prairie Dog “Molon Labe”