Thanks everyone for your input, I think the C3 "qualities" are going to be all part of the experience.
I have driven another C3 and it seemed very similar, also a C5 and i am still trying to make my mind up.
I might just have to buy a C5 and graft a cC3 shell onto it, - no I have not checked the wheelbase!
As another thought, I see a couple of mentiones of 'flat' tyres, this bring backs memories of a tractor I used to have which ran on terra tyres at around 5psi, the type they fit to monster trucks. Especially in cold weather, first thing in the morning first set off was like a roller coaster, then after a few corners it was really rock and roll!
It could take 30 mins to get the tyres warmed up and comfort returned.
I'll keep scratching my head???