PP2010 is basically a side-grade of P8, essentially the same except for some extra features and 64bit functionality.  If you are interested in upgrading, then P9 or PP2012 would be the choice.  Better off with PP2012 because of 64bit functionality and gamma correction for one.  Other features include WM creation for figures, SSS, etc.  Go to the Smith-Micro site and read their comparison chart.  This will give you a better accessment what each version can and cannot do.