Hi, I'm getting my first pre-build AR and have narrowed down to the Noveske Lo-pro, LaRue OBR or PredatAR, or LWRC M6a2 - all with 16 inch barrel and iron sights. They're similarly priced except the PredatAR is bit less expensive. I get it for the range and home defense (maybe). How do they compare in terms reliability, build quality, warranty service? Not sure how long it takes to build one - waiting time. As a first time buyer of AR15, what would be a high quality, good choice? BTW, BCM is not an option since it's not compliant in my state and they don't offer any custom options to make their AR compliant. Thanks for your help.