I have the 906F4 and absolutely love it. I tried the 909 and it wasn't any better so I stuck with what I have. It's a really forgiving club as well, if you are a little off center, you still get good distance.
I do not like the Aldila NV shaft because the flex they say it is isn't right. I think it plays softer than what it reads, i.e. if you bought a stiff, it will most likely register as a regular flex if tested. I would look into getting fit for a new shaft.
The club head is fantastic though, you won't be disappointed.