I've been to David's Bridal, RK, a hole in the wall shop in midtown- don't remember the name, and Gowns by Louise in the Bronx.
Great post- I need to continue my search. I think I found the dress but I want to look around a little more and retry it to make sure it's "the one".
I like the service I got at RK and will definately go back. Just get there early to sign in and don't go on the weekend.