(to WhyNotME)
I understand your conceren about which yeshiva you will go to but remember the yeshiva is the tofel, your determination and effort you personally put into your learning is the ikar.
A bochur asked R Yaakov Yisrael Kanievski for advice on which yeshiva to go to(i cant remeber R Kanievskis exact reply) but he answered that at the end of the day the greater the bochur toils determines his success not necessarily the yeshiva.
You can go to any yeshiva and become a gadol betorah if you apply yourself with unwaivering effort in your torah study.