Your spot on, you cannot find a trailer with a better layout, dry weight, or amenities for the money. In my opinion, that layout was in our top 3 when we were looking. We opted for a lighter trailer after crunching tow numbers.
The cap issue is addressed in several places on the forum if you search for it.
As far as issues, I've not seen anything overwhelming in the forum on the sunset trails, other than comments on the cap.
You might want to drop Maxable
a line. A fellow Canadian that just bought a 31SS and posted an option to apply a 3M protector tape to the front. Awesome idea IMHO.
I have a 2013 300BH and the LED strip on the awnings have tendency to putter out after a few uses, but they've shipped replacements under warranty.