Looking on from a distance, and having read and pondered the other comments, I think the Aerostar is no good for you - how long will it be, until it places you before exactly the same dilemma? I should think you either keep the current plane, with all its charms and known vices, or you switch to something recent, so as to be on the safe side for a couple of years, at least. Perhaps consider the new Tecnam twin? A good step backwards sizewise, of course, but it fits all your requirements and would be much cheaper to operate.