The final answer for you will be what your Sensei's standards are ??
They now vary from dojo to dojo.
A judogi will be too heavy, the Karate gi is cheaper and does the job fine.
We still follow the teaching of Kenshiro Abbe Sensei from the inception of Aikido to the UK in 1955. Only dan grades wear a Hakama..It is a special event when reaching dan grade to be presented with a black belt and a Hakama. That is how it was.
As I said ``things have changed `` we have not.