ATV, I'm not sure I agree with your soffet/gable or soffet/ridge. You might have to explain this to me. In my house I have gable, soffet, ridge vents and fans. Since we use and want the heat only while it is contained within the house, after it leaves the insulation I want it out of the attic ASAP. The reason I have all 3 vent types is snow can cover the ridge vents compromising the convective air flow. This is where the gable vents are a back up. The type of insulation can also be a factor. Blown in type can be moved around within the attic durning high winds. It is not uncommon to have a big pile in the center of the attic and bare areas around the edges.
I'm not real fond of the tyvex type house wrap, but prefer tarpaper. This is another topic.
