I would probably buy the 16' for a couple of reasons. One being that I made the mistake of buying a 14' and now wish it was 16'.
The trend locally seems to be 9' ceiling hieghts (as in your case?? 9+1+9=19) and 14' is to short to work comfortably. It requires you to go past the "Do not stand on or above this step" to work the connections in the box.
As a side note, I'm not sure if they can be bought without, but my ladder has an extra set of horizontal braces between the legs that you install after the ladder is unfolded. It really adds to the strength of the ladder. I also opted for the 375# rating cause I'm a big guy and the stuff we carry up adds up in hurry.
