Its good to hear the Gooodyear quality control is better now and people like them. I had a bad experience a few years ago with that brand and so did a few of my friends.
If these new trailer tires have issues I might try the Goodyears again. I may not even own this old 2006 trailer in three years, who knows. But its around $350 with tax to put four Mastertrack U203 E's on there right now. If they make it another three to four years I'm good. I have TPMS, so I keep an eye on the temp and psi.
Over inflation is not good, even max psi is too much sometimes. That max psi rating is not a suggestion. Make sure the valve stems are rated for the psi! Most shops use snap in 65 or 80 psi on the 15" or 100 psi rubber stems on the 16". I have to buy my own metal bolt ins and bring them to the shop, around here they never have the bolt in type for small wheels. Mine are rated for 200 psi and they last and last.