Tire Recommendations for 7500 GVWR TT

Hi, We have a 2011 Jayco Eagle TT, 28.5', Dry Weight 5690, GVWR 7500. We are the second owner. The OEM tires have aged out so I'm about to replace them. They are Goodyear Marathons, Load Range C, 205/75R15, rated I think it is 1895 lbs ea. We haven't had any problems with them. We generally go camping 5 nights at a time, about 6 times a year, with the occasional longer trip. We do not load heavy, so for sure we are well under GVWR for the TT. However, we do live in the desert Southwest, so in summer, sometimes we do tow in high heat, though we mostly travel in the mornings to ease the heat strain on the truck and the TT.

For safety, I want to upgrade to at least Load Range D tires. I have already bought online and received, 4 Greenball Towmaster SS Special Trailer Radial Tire from Costco.com. They are Load Range D, rated for 2150 lbs ea. But before I have them mounted, I want to take a final look at this, as they are still returnable.

I did research on a number of trailer tires online, and it seems you can find good and bad reports and reviews on almost all of them. The Greenball Towmaster tires are no exception -- I find mostly happy owners with the occasional bad review/report.

I'm looking for any specific tire suggestions for our application. Thanks in advance!