Thinking of "updating" my '91 NSX and getting a newer one- perhaps a '97 which has the six-speed... or maybe (God forbid!) a '99 911 Carrera. I want to keep the cost under $45k for either. Porsche downsides include no targa and probably higher maintenance costs. Does anyone know how the water-cooled Carrera fares on maintenance/durability? Any other insights appreciated as well.