Is there a recommended vent for new roof?
Have you considered changing to a ridge vent?  The larger area of venting would give you more efficiency, it can be shingled over to hide it, the filtered ones a piece of material to prevent insects and dirt from getting in, and this one appears to not leak even under high winds:

http://www.homedepot.com/h_d1/N-5yc1v/R-100027903/h_d2/ProductDisplay?langId=-1&amp;storeId=10051&amp;catalogId=10053

Since the ridge vent is installed at the top of the roof, you don't have the problem of water running down from above and going around a break in the shingles.