Yea I think I will get a complete bcm. Pretty great price. Aero i had never heard of until this morning. I just want another lower that is good quality that I can register and have ready in case I come across some upper I like.
I have one of the Noveske Chainsaw lowers, I like it a lot, no issues. For another build I'd go with the above advice and get an LMT or BCM assembled lower, or a stripped Mega lower.