I can't really comment on NEA lowers, but heard there was some issues. I would consider an Aero Industries lower and can be ordered from Saskatoon Gun Works. I have a Bushmaster AR and like it a lot. It is my first AR so I have nothing right now to compare it to, but has worked flawlessly. I would not be afraid to purchase a Bushmaster product, although there is others that will disagree. I would say it all depends on how much shooting you are planning to do with it, what you want to spend, what you like, etc.. I am building an AR using a Colt Canada IUR, Colt Canada BCG and with an Aero or LMT lower. Should have it ready by the end of summer.