I am thinking of trying a LW stainless barrel on my 5.56 DD upper, I would sure appreciate any recommendations, the Noveske is always a good choice but wondering if there is something lighter in a 16 inch tube?

Odin's making an ultra light Wylde chambered barrel. Weighing in under 23 ounces it looks interesting:

https://www.odinworks.com/223_Wylde_16_1_Carbine_p/b-223-16-ul-ml.htm

Pencil profile BHW 16". I really like their polygonal rifling, clean easy, shoot straight, well finished, and are reasonably priced.

http://www.shop.blackholeweaponry.com/556-caliber-16-length-AR15-556-16.htm