OMG!!!! hard choice...
I always say go with your gut, what you feel you look 'beautiful and feel comfortable in! So I would have to say, maybe the first one... Since that seems to be at the head of the pack. From your description, it may seem a bit more 'you'?????
I really like the lacey strapless one! (the seventh photo posted) WITHOUT any sash.... It is so beautiful and simple without the purple sash... A sash cuts one off at the middle and is not slimming.
This dress would be wonderful for the setting of your wedding, in a church, with the reception you are describing.
The last two posted would be my least favorites... the design of both of these is cut off by a waist/sash in the middle.
PS: Did you say December????
Have you considered any gowns with sleeves....
Congratulations!!!!