I’d tell you to go no lower than 192.
Even in a bar, you might notice the sound on those 128s is not as “crisp” and distinct as the 320s or wav files. In epic/emotional trance, which has many layers of many sounds to make that full effect…a lower bitrate will get rid of many of those little tweaks and blips you only hear when you’re listening.
Can you get away with 128? Yes…but I think you should shoot for better simply because as one person alluded to, if you play a 128 and then go up to a 320, you will hear a difference.