what acadia said.  those you listed, except for nerd's, are overkill if all you want is display some image in the background.  nerd's is useful because it also gives you a seamless (flat) ground along with your backdrop, which tends to add to realism, but you need to prepare images for it if you want to use your own.  but if you consider buying nerd's, you might also look at RDNA's infinity cove 2.