Hi Robert! Without an idea of the kind of images you like creating, it's a little hard to answer your question. Regardless, that's a pretty decent set-up for anybody looking to delve into photography
First, it is great that you are taking photos and creating images that you like. As far as a camera is concerned, if the one you have is working and you are satisfied with the quality of the images / photos
Nila Small graduated backgrounds are difficult to find and most kits have either white backgrounds of a set of colors. You might contact Glazer's Cameras in Seattle as they sometimes have some.