Unfortunately, online communities are rarely capable, as a whole, of taking things as they were meant. I once posted a pretty basic "only 3 guns" thread, with the basis that my other half wouldn't let me have more than that. I only intended it as a joke. However, despite explaining that this was an idea I preferred as well (always been a minimalist), I got over 100 replies of basically nothing more than "I'm more of a man than you."
So, I feel your frustration in starting a thread about guns and having half the replies be nothing more than personal opinions and judgments about the quite irrelevant side-joke.
So, with the point being "How should I spend $5300 on guns?" Here is my opinion:
1: Buy a 7.62 suppressor. That way you use it on anything from a standard AR to your bolt-action rifles. Tests show there is very little loss in suppression between a 5.56 suppressor and a 7.62 suppressor, on a 5.56 rifle. ($Say, $1200-$1500)
2) Buy a basic .223 AR (Say, $1200-$1500 on the setup).
3) Buy an AR10 or Kel-tec RFB, to use with your nice new suppressor (About $1500-$2000 for the setup, which makes for about $4000-$500 now).
4) If you have the money, then get a 10/22 and a .22-specific suppressor for it.
Now, I personally would probably get ONLY a Kel-Tec RFB, the suppressor, and then a suppressable .22 rifle. Then I'd probably sell all the other rifles, heh. But, again, << minimalist
. But yeah, the RFB will do everything your other rifles will be able to do, and also be a great defensive rifle. Then you'll have the 10/22 or maybe 77/22 for super-quiet suppressed shooting.