I am going to finally get a digital camera. I like the small size of\nthe S230 as I want to carry it in a belt pack. It looks like I could\nget a pack for the other two models as well. So, I would like opinions\non the cameras. It would be used for outdoor travel photos, indoor and\noutdoor family photos and maybe some close ups. The A70 and 3100 both\nuse AA batteries. Is this really a benefit if you carry extra\nbatteries that the S230 would need? Thanks in advance for the input.