Matching Tire and Wheel Capacities (follow up)

"Not that I plan to go 80 mph, but I like that margin of error. That is, I'd rather go 60-65 mph on 80 mph tires versus going 60-65 mph on 65 mph tires. That's my motivation."

That's was my motivation also...I just did the exact change you're thinking of back in August by upgrading to Goodyear Endurance. I inflate them to 60psi instead of the 65psi and I won't travel over 65mph. With two trips completed since then, there's been no issue. I also added a TPMS for my peace of mind.