For me i cant listen to anything below 200kbps. I constantly try to see if i can tell differences between .wav and 320. Thats what i listen to. But i also own Monster Solos and i love them for certain bass heavy music. A lot of people would disagree with me. So music is subjective, but if your just asking me if i can hear differences , yes.
196kpps is unlistenable to me, it sounds like listening to an old static radio. AAC and 320 i would never be able to tell a difference. 250kpbs is my "line" if you will where i start to hear differences. What does matter is that your happy. You should seek "better audio" if you want to hear better sound, if you don't hear it, SAVE MONEY. Some people are fine with 10 dollar earbuds, and some hear better and can't go back. Some people think american idol singers are good singers....