I wouldn't change tires at 5 years either, but that's a personal choice.
Bridgestone also makes the Firestone and Dayton brands. Daytons are commercial duty (truck) tires and I see no reason they would not be fine as long as you are talking the right size and load range for your coach.
You might also consider Firestone, Continental, Toyo, Yokohoma, Hankook, BF Goodrich (a Michelin brand) and Cooper if they have products in your size range. All excellent brands with a solid track record.
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL