From what i’ve read for now, i tend to the opinon that the PA-editions might be considered as an independent branch of the GigPerformer tree… so at the moment you’ll get some benefits by choosing the PA edition (i.e. some templates for their own plugins), but they might follow their own path regarding updates and upgrades.
Maybe one of the devs will have a better answer for you…
But as David-San already mentioned: In case of any issues, you will get all the help we can give - regardless of your GP version, that’s for sure. 
