I love this sort of stuff, I want to be as light as possible but then oh wait I have a budget. I am not saying spend billions but saying light as possible maybe isn't the right way to phrase.
State frames seem pretty chunky, almost 6lbs for frame and fork on the black label, The Undefeated II seems a bit more reasonable and looks a lot better but not for me.
If I was looking to go ultralight, probably a
LOW would be in the cards and I would ask Andrew not to paint it for even less weight. There might be others who could do it lighter? I know an ex-co-worker who had a LOW and loved it and he had it built out decently light.