Micro for sure. Seems like the only real difference in the lower profile windage adjustment (been a while since I've compared side-to-side, sold all my standard for micros). I don't know about you but I don't really dial windage with my rear sight, ever, on an AR.
Echo front sight. I also like the standard over the micro.
Durability I can't see being an issue unless you have a habit of torquing your irons sideways while in the up position. I'm not even sure how you'd manage that unless you were trying. I've never had any issues with my KAC's in any situation, from concrete bench to run and gun down in the dirt.
I'm not cool. I just do this stuff for fun.