If you want one rifle to do everything you're going to have a tough time.
With a $2,000 budget you can buy two rifles, a lightweight carbine for room clearing and a second rifle with longer heavier barrel for hunting or long range target shooting.
I'm not sure why it's so important that it be "out of the box ready to go"? Assembling and AR15 is pretty easy, I mean if I can do it, anybody can. And then you get the exact features you want.
The ready to go out of the box rifles I've tired are the Windham Weaponry (my rifle) and the S&W M&P sport (friends rifle), both have been pretty solid so I could recommend them.
All my other AR experience has been with frankenguns (rifles cobbled together with parts from different companies), and they work just fine too