They are all good schools, but all different. I don't think there is a best one to aim for, you need to visit and see which you and your DD feels best suits her.
am looking to move when and if my dd gets in
The problem with this is that all except Colchester (at the moment) have a catchment area so your DD would stand a better chance of securing a place if you moved before the exam rather than later. Out of catchment children require significantly higher scores than in catchment, so if you are going to move anyway I would do this first making sure that you have a good back up school option nearby.