With the ages of your kids I would definitely stay at CBR. The kids play area at the pool is just awesome for little ones. I loved the theming (especially the music on the buses, the kids and I sang Kokomo spontaneously for weeks after we got home), and the food was very good. I always hear bad stuff about the buses, but we only waited more than a few minutes once, and most of the time the bus pulled up just as we arrived at the stop, no waiting at all. Since the buses are not actually dedicated to a specific resort, any of them can have a bad patch during the day it's not specific to any one resort. It is spread out, but nothing is further than a beautiful 8-10 minute walk. The movies in the evening are in the courtyard next to the pool and bar, and there are plenty of chairs, no need to sit on the round like at some of the other moderates.
The only real issue that I had with CBR were the beds. They are still doubles while all the other mods have gotten queens recently (CBR was refurbed before they decided to o with queens, apparently). The pirate beds aren't all that comfortable in the themed rooms, in my opinion, but my kids were fine and others here have said they didn't have an issue with the beds, that's just a matter of personal preference. If beds aren't an issue for you, I'd definitely stay at CBR.