Listening to old MP3s that I downloaded almost a decade ago at 320kbps quality. Sounds amazing. I'm only using a pair of Sony MDRZX110 (excellent quality headphones for under $15, the bundled B&O sounded terrible). Do y'all notice any difference? If so, how much of a difference? It sounds noticeably better than my laptop PC audio. Wonder if I should invest in a better headphone.