tires

i'm about to replace 15" marathons on our 3124kb....
does anyone know of any new research or does anyone have any councel and/or advise on truck vs. st ,goodyear vs, anyone else etc...
blowouts on marathons or any other tire makes my family very concerned'!!!!
i'm sure most campers are well aware and probable quite diligent about loads and maintaining tire pressure....
there must be someone in our network who done some investigation etc...

thanks bill s