Confusedyid,
I don’t know you or your son, so I can’t give you any specific advice. I will, however, give out some generic advice which I’ve always found to be helpful.
Many people want to get their son into the “best yeshiva.” That, in and of itself, is not a bad thing. Going to the “best yeshiva” may well bring your son (and perhaps, by extension, the rest of the family) certain benefits and advantages.
However, instead of looking for simply the “best yeshiva,” find the best yeshiva *for your son*. Your son is not like anyone else’s son. He has his own strengths and weaknesses. If you put in a yeshiva just because it sounds good but it’s a poor fit for his personality and learning abilities, then you will lose far more than you gain.
If you’re happy with your son’s elementary school, why don’t you speak with your son and his teachers/principals and ask them for recommendations?
The Wolf