I have used Premiere, iMovie, Windows Movie Maker, but my favorite is Producer. Producer is an add-on to PowerPoint and you can synchronize in all different kinds of content (audio, video, slides, etc.) It also allows you to chop up video like all other editors.
http://www.microsoft.com/windows/win.../producer.aspx So, if you have a small to medium amount of content, give MS Producer a try.