UPDATE:
I've been slacking working on a few weapons, and I think you guys are going to like them.
I agree Silenced Weapons shouldn't just be a stronger, silent version of a gun. So, we only have 2-3 silenced weapons (depending on how this goes, I might add an in-between). A silent pistol, and a silent sniper. Both fill a reasonable niche - up close, silent kills, and ranged silent kills. At range, it'll be hard to pinpoint the sniper, filling a valid role. Up close, your friend could die behind you and you'd never know.
For fun weapons, I've got some real good shit for this. I won't share yet, but expect a sneak peak soon.....
But anywayz, keep the suggestions coming!