In my opinion, none.
I started with Pinncacle Studio 8 but had sound synch problems.
I was told to get Pinnacle 9 which I did, still got sound synch problems. Pinnacle advised me to download the 9.4 patch which would solve it. It didn't.
I then tried Pinnacle 10 and that was even worse.
I now don't use Pinnacle at all.