I still have no idea what I want the cake to look like, but I have a pretty good idea that I want to display it on a vintage-y white cakestand. These are some lovely options.
This was a vintage find on Ebay displayed on the blog Peony Love. It's no longer available, but it sure is pretty.
White, ruffled cake stand from Feather Your Nest.
Beautiful blue and pink glass cake stands from Look In the Attic Company.
White porcelain cake stand from Porcelain Elegance.