I too considered the JayFlight with fiberglass for a brief moment. My conclusion...
1) Jayco has spent considerable resources touting the superiority of their "vacuum bonding" process for fiberglass sidewalls -- then they don't use that same process on the JayFlights. So if what they themselves claimed, vacuum bonding is the superior process and helps reduce delamination, then I had to conclude that the pinch roll process is inferior and the JayFlight sidewalls are not as good of quality as Jayco's other lines with Fiberglass.
***dont know if you care, but last year when researched it I was surprised to learn that JayFlight with fiberglass walls still had 2x2 wood frames, not aluminum.
2) once I saw JayFlight fiberglass sidewalls on a dealers lot next to an Eagle and Whitehawk I lost interest in a JayFlight with fiberglass. The sidewalls were not gelcoat and too me looked like unfinished fiberglass.
3) I didn't want to spend the $ that Eagles cost, so then it came down to Whitehawk vs JayFlight with Alum. After spending hours Looking at and comparing both there was just a lot of features and upgrades missing in the Whitehawk we wanted, I didn't want to contend with the possibility of delamination so we decided on another JayFlight stick and tin TT.
Ironically after all that research of visits to dealerships and RV shows, we found exactly what we wanted used and purchased it private party. Couldn't be happier with the TT and saved $10k + going used. It extremely nice not to have had to get a loan.
2007 Chevy Duramax LMM/Allison
2012 Jay Flight 29QBH
2012 Jay Flight 26BH (Sold)