A place to display the quilt without obstacles, a digital camera with zoom, and a good flash. I see a lot of posts where people say the colors are really brighter than shown. Using a flash and getting too close to the quilt will make everything too light. Back away, zoom in, and take the picture. A quilt laying on the floor is OK when we know that; we understand that distortion. I don't like "photoshopped" pictures, except maybe to crop the picture. My camera is not professional grade, but it is a few steps above a cell phone.
But by all means, use what you have. We love pictures - ALL pictures!