I agree that it's hard to find good dresses with straps- everything is strapless now it's so annoying- even when wedding dress shopping just by wanting straps it took away sooooo many choices. Alright here's my 2 sense on the bridesmaid dresses... I really like the first dress you posted (that's shown in peach), the 3rd one (shown in white), the 5th one (shown in brown), and of the Watters dresses I love the one on the far left! So you've got some good options to work with- I think I would go with what you can get the right colors in though! As for balancing the 2 sides this is what I would do... I recently saw a wedding and their was a female attendant on the grooms side and she was in a black dress that matched the bridesmaids dresses and it really blended in nice with the tuxes (I wish I would have saved the pic bc it looked so nice and I wouldn't have pictured it that way unless I saw it). So I would do groomsmen with black tuxes and green vest, and the girl on the grooms side with a black dress with a green sash. Then the bridesmaids in a dark purple dress with a green sash. The man of honor could have a purple vest if he would agree otherwise I think he would look fine with a green vest and then just have him with a purple boutonierre. I think all the bridesmaids and the female grooms attendant could have the green umbrella... thus unifying the 2 sides. So the grooms attendant wouldn't look that different from the bridesmaids (only difference is black dress instead of purple) but she would blend in more with the groomsmen. Hope that makes sense.... just an idea for you!