FWIW...
I have a mid range (price) DPMS 16" carbine. Love the thing. It is nothing too special. It is a 16", 1 in 9" twist, 5.56 bbl with M4 feed ramps. It has the traditional forward assit, staked front site post with lug. It is a flat top. It sits on a DPMS lower.
I have a 1-4 Trijicon TR24R in a Burris PEPR mount on top.
DPMS makes my favorite hammer. Unless I am using a single stage target trigger and hammer, I prefer DPMS hammers in everything.
I prefer it over my Colts or RRA. I say it is hard to compare any of my "builds" so I won't or don't. I would say is probably my "go to" rifle. But, it does not get a ton of use. A few thousand rounds a year is about it. Never had any issue with it. It is easily my most reliable AR. Then again, it is hard to run any one of them very hard all of the time without neglecting the rest. I'd have to say my RRA has given me the most problems. I've had a few broken parts with it a few times. Yet, I don't know why. I would guess, generally, "parts is parts" ... LOL! RRA has been good about parts/service. I added a DPMS hammer to my RRA, and that has helped a ton. So, I will do something like that to my Colts eventually. But, they are harder to get parts for, given how odd ball Colts can be.
DPMS has made some rifles (AR15s in 5.56) that I have seen which I would never buy. Those had no forward assit and probably no M4 ramps. The front site base was held on with set screws that only supplied upward pressure. Those economy rifles weren't that cheap and they did creep me out a little.
YMMV