This idea makes since for stealth-based characters as the "Silent-Kill" is the pinnacle of this character type. This in my mind should be reserved only if you deticated yourself alot to building a stealth character. So this ability should probably only be avaliable as an advance perk or something.

First off for those of u that say 'watch the trailer, there's a sorta silent takedown in that', I mentioned in my OP that I saw that, if you didn't realise/read that that is what I was talkin bout then that's my mistake, I apoligise and should have made it clearer... Also Karl Fellhelm, your idea that it should be as a perk is very good, maybe sumpin like level 3 - 5 of that type of stealth perk, so that it takes up 1/10th (or close to it) of your perks... i.e. your're a stealth char... Perhaps there could be similar perks of this magnitude for Combat and Mage types as well...

EDIT:

Good point.