ND filters are great, though it looks like you did a pretty good job without it. Only the top left really gets to me as needing it, the rest is ok.
Tried to use the panorama function in PS, almost nothing else done to this. Once it's gone through the panorama stage (like you normally hit "ok" on a raw file after adjusting exposure and everything) how do you make the photo so it's not so . . . . . . . I dunno how to describe it. Whitish? Faded? Light? I'm sure you can tell what I don't like just by looking at it.
C&C always appreciated
Edit:
Original size. Warning, it's big.
Also, wheezy, I like the pose / expression of your model, well done. And I'm very jealous of your 5D Mark II