Also remember someone saying that some of the backspacings are set using a spacer. To me thats not really a big deal if the spacer is a good quality one
No such luck. Mine spacers were some of the cheapest universal Chinese crap I've seen. Fortunately, I was able to use the rims as-is (4" BS), and didn't need them.
Don't get me wrong, I'm still happy with the Coy's wheels, especially for the price. I think they look great. But I'd recommend anyone buying a set "with a different backspace" to get some GOOD quality spacers and just use the ones from Coy for mock-up.