May I chip in some information, though not first hand so I cannot comment whether it is authentic to which degree. My uncle bought a 9th Gen Oriel Prosmatic in Black about 2 weeks back. Oddly, he sold it on 22 October 2012. Being curious I asked him why. This is what he had to say:
1. High like Corolla. Lesser aerodynamic (strange statement but he has a degree in Aeronautical Engineering so..)
2. Rear Design (Sucks)
3. Build Quality specially of Plastic and Rubber materials
4. Knocking Issue
I don't know how much these issues are affecting his comfort or expectations. He offered me an exchange for his 9th gen with my Viper. I would still love to make the deal BUT I can't afford the extra cash I have to shell out. This time, I'm either waiting to pool up some $$$ for the facelifted version of 9th Gen (Hopefully by that time most issues might have settled) OR get a mint low mileage 2006 C180 Kompressor. Period.