nnngoose,
Is the explore a group test? I think I read somewhere that the preference is not a group test if possible. Is that right, Trinity or Dottie?
Kriston,
Sounds like you have made a well thought out and reasonable decision. Good luck and hope DS has an enjoyable experience with the WISC, I'm sure he will, DD7 thought it was fun.
I think you are wise to include two qualifying test scores for his application.