I currently have a Canon S5 IS. While it has almost everything I want, I would like more DOF and better quality indoors as that is where I take most of my photos. I pretty much only take photos of my kids. While on a vacation I might take a picture of a landmark here or there but mostly its just snapshots of my kids. I've read that most of the lenses that fit the D40 won't autofocus. Would that be something that I should actually be thinking about? What I mean by that is, would I actually want to upgrade the lens it comes with knowing what I will be using the camera for? Are there any other cons to this camera for me?