That is a tough question!! OK, money being no object, buy suitable rims to go with tire upgrade.
Another thought keep same rims, inflate tires to 60 psi.
Another option,forget the Endurance, buy Carlisle, or Provider tires C-rated 50 psi.
Agree with above, tire store guy won't notice rim restriction, or he'll figure what's 5 psi, no big deal.
Myself, I would stay with original tire/wheel rating, and put one of above mentioned brands on, inflate to 50 psi, and call it good, unless barely adequate. But that just me.:)
Jerry