need dress opinions PLEASE!! I'm so confused

So I'm sure most of you heard my rant about which dress and being torn, etc.
When I did my first visit at Wedding Salon of Manhasset, i tried on about 20 dresses (RoseMary is absolutely a gem). What happened was the 1st dress I put on was mermaid, which looked so good I automatically shut down any ballgowns b/c I was into mermaid gowns.

Now 3 weeks later I'm thinking more sensibly and wanting a ballgown since its the only day in my life and re-considering 2 (plus a few more newbies). Here they are:

Dress #1 Monique Lhuillier Coco skirt/Confetti top
This was my original thought for gown. This was SO COMFORTABLE it felt like a nightgown. When I tried this on I felt it wasn't sexy enough, but now that I'm going princess-y this will be in the new top gowns pool.

Dress #2 Kenneth Pool Grace dress
Wow what a showstopper! Just not that comfortable, I was wondering how I was going to use the bathroom in that

Dress #3 Kenneth Pool Degas
Haven't tried it on yet, by the looks of it though I think I will love it too.

Dress #4 Vera Wang
The fantasy dress (I know a bit ridiculous) but amazing and dreamy. Looking forward to trying this on too!

GIRLS PLEASE HELP ME!!