I built it, actually. I got help from a pro for some of the "hard" stuff, like mounting the GB on the barrel with a specific type of set screw that binds in there, but other than that, and knowing what I know now I could do the same build for a bit less I think.
Basically, If you want to buy a raifu off the shelf that's fine, just make sure the trigger ain't bad, and switch the faggy milspec charging handle that feels like it will break if you sneeze on it out for a BCM with an extended latch, or some kinda ambi option. That's about $50, sometimes more like $40.
Then get yerself a SOPMOD stock. another $50, sometimes less. Then a Magpul K2 or something with a similar angle. Another $30 bucks, sometimes less though. If you're willing to get bit messy and pissed off and have punch pins for armoring your AR15 (which you should get anyway DESU, also a small brass mallet) then you can go full TISM and knock out your milspec BHO and replace it with a Strike industries. That's about $20 without tools.
Final little bit to make it run real good is switch out milspec buffer for something like an H or even an H2 if you go a bit shorter. I have a 14.5" pinned and I went with an H2 drop in and my gun runs reliable as with milspec, but recoils much more gently. That's around $60.
So basically I realized that if I built my gun I'd be getting that feature set without the added cost of throwing away perfectly good parts.
My gun did cost around $1.2K, after all that shit and an optic, but I think it's still very much going to run with a "Big Dog" like an LMT and a Noveske in terms of practical shooting ability. Basically I'm just saying I think that building for $1.2K is the optimal cost efficiency zone.
As for your two choices, Colt is good as a basic bitch kinda gun, but POF has more feature set. I guess it really depends what you wanna do. I don't want to scare you off with technical crap. ARs are dead simple. Anything else you wanna ask?