dahlias or ranunculus?

We're planning on using dahlias at the wedding. I'm just not sure yet how we'll actually get them. I might order them online or pick some up at the farmer's market in SLO. There is also the San Francisco Flower Mart (if my mom picks them up) and I can also order flowers from the floral department at Scolari's in Pismo Beach.

I also just noticed they have ranunculus at Costco online. But I'm assuming they won't still be available in August, since they will be out of season. Although if they are, it might be a hard decision to make. I love them both.

Here are some of the images I'm using as inspiration: