I just went through this trailer buying process this spring.
I had an older steel trailer and wanted to replace it with an alluminum.
I think I looked at just about every make on the road, like a lot of things I found that many of the brands had features I liked as well as characteristics that I didn't.
All of the brands listed so far got good marks in my book.
However I didn't want a trailer with punched sides like the Wilson etc because of the cold climate up here in Canada, going to fall shows it can sometimes be VERY cold. I've hauled in -30 ugliness before and I didn't want that hassle of replacing all those rubber plugs.
So I ended up with a 2009 Sooner SR724 Ranch.
I've put about 4,000 miles on it since I got it in March and so far I'm happy with it.
I have some horses as well so i really liked the 7'2" inside height.
I got it with a slide in Plexi Glass kit as well as rubber mats on the floor, 2 dividers. It seems to be very well built, the welds look to be very good quality, the upright posts are very sturdy and it is gusseted where I have seen similar trailers crack.
I guess I'll know better in 10+ years if it was a good choice.
On this particular purchase it came down to what was available, what I was happy with and a deal tha I could live with.
My next choice probably would have been a Sundowner 7X24'