Personally- I would either go with the co that made the color- or go to paint professionals, which I do not consider the counter help at a box store. They can follow directions and make their paint, but unless you personally know the person to be a real good matcher- ( actually goes for the pro shops too).
The machine color match can only get close, then it is the experience of the matcher to close it in.
The machine color match can only get close, then it is the experience of the matcher to close it in.