Weddingbee boards

It's not like you had them go out and buy a dress, and now you've changed your mind - they are not out anything at this point, because they already owned the dress, right?  I would go ahead and let your FSIL know that after thinking it over, and picking the clothing for the rest of the bridal party, you think that the dress they already have won't really go with the rest of the attire.  Then send her photos of the dresses you like.  It would probably help a lot if you get straight in your own mind whether you are asking them to actually buy one of the dresses you email them photos of, or whether again you are just asking them to find a dress "like" one of those.  I think you will have a better chance of being happy about the outcome (since you already know that your ideas don't mesh with theirs) if you just let them know that one of the following dresses would be good.  Maybe you can have them pick the one they like best, and you can buy it and have it sent to them.  That way you get what you want, without taking the chance of getting into another situation where you basically go along with what they like just to try not to be disagreeable.