Choosing a Gown

I'm going through the process of finding a gown. How do people know when they've found the one? Personally, I thought I found "the one" a few weeks ago online but then I found two more which I fell in love with yesterday. Now I have 3 on my shortlist...

I can't even try on any of these gowns to see whether I have "the moment" (the realisation that it's "the one"). No one in my city even has these gowns for me to try. Some people can't even find one dress they like... I have 3!!

dxx