A and C, absolutely agree. That's what happened to me! The trick is to keep the 'keen' PPL folk interested enough to complete the PPL in the disappointing C150 in order they can 'discover' the more interesting machines.
In our case (there were several of us keen young lads in the same boat) a wise CFI realised this and organised the founding of a Chipmunk group, which we joined immediately on qualifying for the licence.