RE: 2008 isonic's
sorry I forgot to mention. 100% of F1 cars are purpose built for racing in the hands of F1 drivers and absolutely none of them is going to be used by the general public. While almost 100% of production boards are used by the general public, few of them by racers and very very few by top notch racers that can be compared to the equivalent of F1 drivers.
New models are OK, but please don't ask me to believe that changing everything every year is necessary. I guess that if yourself were asked to choose between an '06 PA 80 and a '07 PA80...