Sony Vegas Studio HD Platinum 10 here… Very nice. I tried another version of Vegas previously- I think possibly the non-platinum version- and it couldn’t adequately preview the native Gopro vids, of course everyone said “It’s your computer” but since it works fine with Platinum, obviously it isn’t.
I guess what I’m saying here is, demo first.
Oh, Powerdirector was absolutely terrible. There are workarounds for its failings but it’s almost like it was designed to make your videos look worse, you need to manually intervene at every stage to avoid it killing the quality. Bizarre frankly.