I am not sure about the Wide World of Sports, but DQ is a must do for our kids everytime we go. We usually buy the tickets for DQ through the mousesavers site. Last time, we did the waterpark and more addon because the kids also wanted to try out Typhoon Lagoon. I think normally I paid around 25-30 dollars through the mousesavers newsletter.
If your kids love video games, they will enjoy DQ. We usually spend about 5 hours there. If you are buying the waterpark/more fun ticket I would probably think about it budget wise. That being said, I really don't think I would take the kids more than once a trip. For me, I really am not so much into the video game thing and it gets a little too much for me. I often take a book to read while they are playing the games. Not knowing if your children (or you) would like to go to DQ more than one time, it may be more cost effective to use the Mousesavers Link. But, if you are planning on using the waterparks the add on ticket may be the cheapest route.
I have heard there is not much at the Wide World of Sports complex going on unless there is an event or training camp going on. I am sure there are others who know more about it that will be along shortly!
Whatever you choose have a great time!
Kelly