The ACE23 is likely to get a nerf if you're looking for an assault because it's just so good but otherwise the guns are pretty much the same damage for all in a class and it's just RPM / recoil / reload that are different.
You'll probably get as many responses for the best silenced weapon as there are weapons but I like a nice high fire rate and decent stability when I'm ghosting it up so I use an MTAR (similar to the ACW-R) + wallhack grenades.
Make sure you guys all change your camo by the way - you can only do it ingame for some reason, go to edit your class and it's at the bottom.
Yeah, the MTAR seems to tear people apart up close but I found it next to useless for ranged engagements.
I will probably start testing all the carbines with silencers to see what works for me. Maybe the AK5C will do, it seemed an ok weapon at the time when I used it, didn't like the ACW-R though (can't remember why).
Anyhow, I've added both TS servers so will maybe get on to chat with you guys at some point.