I you are looking for a program that is likely to be very unstable, buy Pinnacle Studio. MANY people complain over unstability.
I wouls suggest Adobe Premiere Elements. It costs about the same as Studio 9, but is probably a lot better. You can get it bundled wit Photoshop Elements, if you need something to edit images with as well.
it costs $99 at http://store.adobe.com/store/products/master.jhtml?id=catPremiereElements&ref=Secondary