I'm happy with the VLTOR. Noveske is now selling the VLTOR MUR with the Noveske brand name on it. I think that in itself speaks to the quality. It is a forged upper but it's thicker and has been stress relieved, heat treated, aged twice and cryogenic treated. The drawback is that it is a little heavier than most but if you pair it up with one of their light weight hand guards, it makes up for it.
For BCG's, I like JP Rifles and Rubber City Armory. For light weight, JP has the light weight BCG and matching buffer. If you go that route, get it with the 5 pack of springs so you can tune the buffer to the rifle. You didn't mention gas block but if you're building a lightweight precision rifle you might want consider an adjustable. SLR and JP are my favorites. JP has a two piece adjustable with a detent that make it super easy to install and if you ever need to remove it you won't have to mess with your compensator.