A couple of questions: How old are you kids, and is the pool an important part of your vacation? If the kids are older than say 5, and they spend a lot of time at the pool, stick with CSR. While I love POFQ the pool is small and better suited to very little kids.
If you don't want to pay for a preferred room at CSR, request to be in the Casitias section, building #4. That is where we were earlier this year, and it was a great location. There is a quiet pool right next door, and the first bus stop is right behind the building. It is also the first building not considered preferred, so you will be fairly close to the main building. Even my picky older sister loved our room location.