Flower Ideas???Help..................

HI!
I am still trying to figure out what to do for flowers. I have an appointment on Friday to pick them out so I have to figure this out fast. I`m thinking roses but am open to other ideas.
The bridesmaids dresses are purple (its called amethyst but not as dark as amethyst, it has a bit of a silverish shimmer to it, but is not silver at all. Just when it moves it gives a silver/purple look. More purple though if that makes sense to anyone.) The rose that matched up to it pretty well is a bluebird rose. I dont know why they call it bluebird cause it is purple.
So I need some ideas for my bouquet and the bridesmaids. Please offer any advice and ideas you all have! Thanks, Mandy