I have just installed director 9 after some extensive trials and am quite impressed. however the wave editor is in my opinion the least impressive. Maybe its because I am use to the wave editor in Nero 9 suite. If you have access to this then I recommend it. I find it more comprehensive. The Cyberlink wave editor is OK for a quick single track edit but hasnt the depth of the Nero one.
I like power director 9 though although the download was unbelievably slow.