I spent a bit of time over at MarthaStewart.com and found these trees. . . . Click Images to direct you to site.
I enjoy looking at the base of the trees just as much as the ornaments. It's fun to see how people handle that particular part of decorating when there aren't presents to stack around the bottom.
I've been thinking about doing this (see below). I have a line of ornaments that my grandma started giving me when I was little. My mom has continued the tradition. Now I have several that I would like to display, and I think this idea will work!