I've had a few different types, my very limited experience.
Power King Towmax absolutely the bottom of the barrel, at least in 2006 and 2008, stay away. The new ones online look different.
Maxxis M8008, very nice
tires although I only put about 10k on them before I
sold the trailer. Nice wide tread.
Carlisle Radial Trail, early ones had many problems. They were reformulated, if that's the right word, a few years back. The new ones look a lot like the Maxxis now. I had about 25k on them, about 50% of tread was left. Had a blow out for unknown reason at about 15k.
Goodyear Endurance. Just put them on, cost a bit more then the rest. They do not look as good, tread wise, as the Carlisles or the Maxxis but they are too new to know for sure. The tread looks narrower but the written specs for them look the same. Not siped as much as the others, tread pattern kind of plain looking. Might be why they are supposed to last longer.
If you want a know good tire then either the Carlisle or the Maxxis are good. A few issues reported here and there but then all tires do. If you want a US made tire that's untested, then go for the Goodyear.
FWIW. I've used the same tire guy since I moved to this home 35 years ago. Seems he always pushes whatever he stocks (Goodyear Marathons) but if I insist he can get anything I want. He orders from the same local warehouse as all the other tire shops do, just the prices and service levels vary.
Do get them balanced, the guy I use outs the weights on the inside so I don't see them. If you think you may want a tire pressure system down the road, ask for metal stems.