A buddy uses a PSA 16" upper in 5.56 with a DPMS lower and it seems to be a very solid runner. Was running a bolt assembly and charging handle by Colt at one time with no issues, so that was also a plus.
I'm sure I have a pic of this within 'group shots' of our rigs. His is a mix of FDE and black, also has a Rock River in what we refer to as 'ACU dark' because its in OD, FDE and black. (Looks good actually.) Personally I've always kept things simple in black and grey, with attention to quality over quantity.
Point is, given some offhand experience with PSA if they're going this route, I'll say they've peaked my interest given what I've witnessed on the range already.
Now if anyone wants to discuss 6.8spc let me know.

Been running a proven and effective set up at many altitudes, barometers, weather conditions, sand, snow, weeds, brush, pine tar, you name it. She's never let me down and always out performs my 5.56 brethren in all categories with the exception of load weight.
Badger