Looking for a well balanced pair of headphones for music.

Made an earlier post last night but have since done some research so deleting that. I am looking for the best pair I can get, I would like to stay near the $300 range, but don’t want to go higher than $500. I want the richest sound I can get with that range, well balanced, maaaaybe a little higher bass. I want to hear all the details. It has to be closed back cause I can’t have any sound leakage out. Bluetooth would be nice to have, but I would easily give it up for sound quality. I have no idea what brands are good, go easy on me! And for my price range I don’t know how good I can get, hopefully it should be enough to get really good sound. I’m upgrading from Bose Quietcomfort 35 II, those will become my travel pair after this upgrade!