Seems like you're set on the design, its not bad by any means, I was more concerned about the actual hole size. For reference, I'm looking at dan case, cerberus, and ncase m1, they all utilize smalller and more condensed hole vents, which imo looks more polished.
Curious about the breathe x, would it be wider or have have more depth(front to back), besides being taller?
I thought my hole pattern was pretty much identical to the Cerberus, which is what I was sort of trying to go for. Perhaps the holes on the Cerberus appear smaller because it's a larger case than mine? I'll do a render with some 6mm holes in a few minutes and tell me what you think of it.
Yes, it would have more front-back depth and be taller.