Hi. Can I ask a question - how many days are you going for? If it's 5 or less, then you'd probably make out using the regular dining plan. It's only $10 extra for you and DH, and a couple dollars for the kids per day. A character dinner is going to cost you around $125, a breakfast around $75. You could get a few character meals on the regular DP.
But, if you're going for a week or more, then stick with QSDP!!!
I'd vote for Cape May Cafe breakfast with Goofy, get a later in the morning reservation and you'll get more character time. The kids get crayons to draw on the tables and it's a quick walk to International Gateway and Epcot, or grab the boat to DHS. Lots of fun and the characters are sweet. It's Goofy, Donald and Minnie in beach clothes.