Can someone recommend one all around lense for a Pentax K10D. Unless someone changes my mind I intend to purchase this camera sometime in the near future. It looks like I will have $400-$500 for the lense. I'm new to photography so if you ask me what I plan on shooting I can only tell you that I don't really have anything specific in mind. I will be taking pictures of the kids, taking pictures while hiking/outdoors, etc.