I'm going with 416 as my first rifle. I'd say if you want to be different, go with something uncommon, but not way rare such that finding parts is impossible. I agree with Danke, the ACR will probably be your best bet at an interesting uncommon gun. A&K will start selling them. Wait a while, probably when you get AV'ed they'll start appearing in the retailers.
What's more important: morality or the freewill? In our society most people would say freewill. But we mustn't forget our morality.
Our morality guides our freewill to do the right thing.