Yeah, 80 meters more impressive snivel snivel... Ok... someone should have told you... j/8.0 Like S2 7.9, um meters or yards or something.
Seriously though a J/80 would be decent to crew on... you'd learn a lot without having to really kill yourself. Asymmetrical spinnaker
means easier douses/gybes, wide open cockpit simple set of primaries and secondaries... basically just playing moveable ballast and grinder as crew. They go fast, and are very stable boats, but still pretty forgiving.
I wouldn't mind upgrading to a j/80 if I stick with the racing set.