Buying New Tires

I just got a set of the EP422+ on Saturday from Costco. Probably the best decision I've ever made is go to Costco. These are better in every way shape and form compared to the OEM EP20s. However, they are noticeably louder and makes me wish I would have just gotten the energy savers A/S. I'm running 40psi nitrogen all around. I think more driving time to see how the mpg is effected. It does seem down a few mpg but my driving has been a little different this week. I think it is the same.