That is a lifestyle question. Personally I would stick with the mini dv and either give away or sell the DVD camera, but then I tend to only shoot video I would like to edit. for day to day use I tend to take photos. If you really thought you might need both of them (only you can answer this) then maybe lending the least used one semi permanently to someone who will be happy to return it to you when you need it. Video cameras are a little like cars in that if they aren't used they tend to break. obviously most people don't use their video every day, but once every couple of months or so for a couple of minutes is good to keep the cobwebs out. If you can't see yourself having enough to keep both cameras busy then maybe it is time to share one with someone else?