Quoted:
Welcome!
IMHO reliability is number 1. None of what you listed means anything if it won't go "Bang" ever time you pull the trigger,
I agree, but after that, all of the listed attributes are important to me. Is there such thing as the "perfect" rifle, well scientifcally speaking I'd guess no., but for the individual, yes. On my last build I about drove myself insane in trying to pick the very best of everything. It doesn't work, unless you have Bill Gate's money and can afford to try everything. Just stay with known quality parts, try your friend's guns, and you'll probably get it right. The great thing about the AR platform, is you can always make changes, after the build, if something doesn't work for you. I've had to make a couple myself, on this last gun, to get it "just right" for me. What's "just right" for me, might be "totally wrong" for someone else. That's the downside of a custom build.
FT