As the Hawks you'd need to put in more, I realize, which was the point (not sure I see how you'd do that post-Murray trade anyway). Brown is a couple tiers better than either of them: Athletic had Brown in 3A, meaning a top-25 guy and Collins and Hunter in 4B...which means they are in the 60-90 range overall. That's a very big gap----Smart, Horford, and TL all are in tier 4A, so in between Brown and Collins or Hunter. White, Brogdon, Collins, and Hunter are all in the same tier to give a sense of how big the difference is between Jaylen and Collins/Hunter. Other guys in the 4B tier are Porzingis/Tobias Harris (to me, those are worse contracts than Collins) and also young guys--Halliburton, Cade, Simons....so there's lots of different profiles in there.
So that's the players; contract-wise, you get two value years from Jaylen and then you have to max him---which he's worth, but not a ton of value at a max deal in my view. Hunter is a FA next summer, which means one year of control then a somewhat risky contract given the market and his injury issues, though I do think he has remaining upside; Collins has 4/$101 mil left which is good level of control and not terrible money (though likely overpaid until new CBA). I'm bigger on Collins than NBA in general seems to be (as you know, he's been on the block much of the last two years) but that is not a super-value contract. So, my quick assessment is for big-market teams who have a shot at FAs the contract side doesn't help the value side a whole lot.
You love your young Hawks, I know, but as we saw with Reddish this year the league just doesn't value "young and pretty good" quite as much as you might think.