I love the first one... it really grabbed my attention...
Not to throw more dress confusion in the mix but do you have a Davids Bridal near you?
They have this great thing called make a match seperates. I bought a black formal skirt and a shawl four year ago for a cruise. Now everytime I cruise, I simply go and buy two new tops! Has turned out to be much cheaper... and since these military balls are a fact of life for you... it might be helpful to be able to use the same bottom....
The gold one or purple. They are all beautiful gowns but I like the empire waist ones the best. You'll be beautiful in any of them. Have fun at the ball.
Another vote for the purple or gold. I think that these would be the most flattering on and I love the beading detail. They are all really beautiful, and I'm sure you will look wonderful in whatever you choose.