Hypalon has more benefits than PVC. I run a 4.1 m Thundercat on the side and most of the name brands run Hypalon right down to their smaller models.
Smaller manufacturers in this area run PVC but just to keep the cost down. Not sure on a tender basis who, if anyone manufacturers in Hypalon but I have seen
a small Thundercat on davits in the Manly Marina, so may be an option for you.
The big thing I have learnt with these boats is to keep it in the shade or keep the pressures down to the manufacturers recommendations.
I lost a cat due to leaving it with racing pressures in the hot sun.

Hope this helps.