Jordan, I use Photomatix Pro, as well, though I also use FDRtools Advanced occasionally. I also spend some time PP'ing in CS4, doing similar tasks.


Since your shot was taken with the 16-35, and you were shooting upwards, the building gets distorted. If that's the look you're shooting for (no pun intended), then your work is finished.


If not, I would suggest zooming a bit wider, taking the pics, then when you're finished with your blending, masking, etc., that you use one of the Transform tools (e.g., Skew) to straighten the sides of the building. Use a grid pattern on the image to line them up.