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Your list of requirements will be tough on a couple points: going wider and more grip typically reduces fuel economy. Road noise is also often up on a tire with more grip.
225/45 is an awful nice place to be for the daily grind but I don't know how that would be on 8.25 for you. 235/40 is still good - 235/45 might be getting tall, I think the trend is to a 235/40 - but that's almost equally smaller. It's a tough width - there really aren't even many options that fit, most of them short on fuel economy and treadwear. 245/40 is great, but that's a lot of tire if fuel economy is important.
Tires that perform better than "Grand Touring Summer" in which you find the Michelin Primacy HP don't typically have treadwear warranties. That said, the UTQG rating may be a vague indicator - but could still leave you quite short of 30k. I used to feel lucky to get 3000 miles on a set of 200AA summer tires (previous car)
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