Have you tried on a Maggie yet? DO IT!
They make your body look amazing. The is some weird optical illusion thing going on with some of the gowns. They also go up to big sizes. If you call your local bridal shops they will let you know how many samples they have in larger sizes.
Vienna is a GORGEOUS A line lace gown, though the price is £1200-£1400. They do however have plenty of styles under this price.
http://www.maggiesottero.com/dress.aspx?style=A3021
Here's a pic I found on a wedding forum so apologies for posting this without permission, but I thought it looked lovely and shows a Maggie on a bigger girl.