Design a marketing postcard - front and back. We are currently think of 127 mm x 177.8 mm

It is an invitation to sculptor's unveiling ceremony. I have the text and the photographs. This may need to go through a few drafts as a number of people have to sign off on it. I want a nice magazine font, something like Vogue or Interiors? I may want to edit it a bit when I see the amount of text, so the designer will need to be quite flexible.