Seriously, with my personal experience, I'd buy a Palmetto State Armory Freedom series rifle with a LOT of accessories and a bunch of ammo for $2k, since I am not an "operator", nor could I be mistaken for one, even in a bad light, at night in the fog, at 100 yards..
In fact, going to PSA website right now, Daily Deal is;
PSA PA-15 16"Nitride M4 Carbine 5.56 NATO MOE EPT AR-15 Rifle, Black $499.99
MAGPUL MBUS AR-15 IRON SIGHT REAR FLIP UP, BLACK - MAG248-BLK $55.99
SIG SAUER ROMEO5 1X20MM RED DOT SIGHT, BLACK - R52001 $119.99
__________________________________________________ $675.97
That leaves $1,324 for mags and ammo. So, giving yourself 20 MagPul Gen 3 Pmags, the best there are in my opinion, brings it up to 975.77. So, a grand for ammo...
WINCHESTER 5.56 BULK AMMO 55 GR FMJ, 1000RDS - WM1931000 $569.99
And since everyone needs some 855 in thier life;
Winchester M855 5.56 Bulk Ammo 62 Gr FMJ Green Tip 500rds - WM855500 $328.99
Before tax and shipping, total cost is...$1874.75. But with shipping and tax to my locations, total is $ 1,916.24, leaving enough to tqake the missus out for a nice lunch.
Now, again, I am not an expert, an operator, or anything else like that and from my direct personal experience it is REALLY hard to beat PSA for great rifles. You can spend much more, but will you get much more? Some say so. One potential "upgrade" some like is going to PSA Premium line with the "Machinegun steel" barrels. Today's deal shows;
PSA PA-15 16"CHF M4 CARBINE 5.56 NATO PREMIUM CLASSIC AR-15 RIFLE, BLACK $899.99.
Remove the green tips and you still have a high-quality rifle, optics, many magazines and 1000 rounds for $1980.25. Lunch just got downgraded to Wendy's.
Edit to add, sorry, the capitalized sections aren't me yelling, that's cut and paste direct from PSA website.