Just swapped to 18" Michelin cross climate 2. I'm surprised how much more comfortable the 20" Perelli tires are. Although I'm seeing a 10-15% increase in efficiency, so I'm not complaining. :
Michelin Cross Climate SUV All-Season 235/60R18/XL 107V Tire - Walmart.com
Michelin CrossClimate 2 Tire: rating, overview, videos, reviews, available sizes and specifications
MICHELIN Cross Climate SUV - Car Tire | Michelin® Canada