Don't let 50 or maybe 100 "complainers" on the internet spook you about gong with a "glass" sided trailer. Sure, those folks had legitimate issues. But across all four manufacturers, over the past 10 years, there are hundreds of thousands of "glass" units still on the road, happily camping.
Just take care of it, and with a jay flight, you'll have two years to suss out any warranty issues.
I've owned two "glass" trailers, one by forest river and my jayco. The FR unit was camping next to me two weekends ago, no roof or wall issues at all, and it's an 2004 model year unit.
It's been said on this forum before... These trailers are not a lifetime "investment." They depreciate really fast and they will all have issues over their 10-15 year useable lifespan.
Just get the trailer that puts a smile on your face and get out and camp. Life is too short to let the 2% of trailer owners who complain ruin it for ya.
Have fun looking at new trailers!