If you can't hear the difference between 320kbps and lossless you're either not using equipment capable of the response and the frequencies where the cutoff for 320kbps and resulting compression artifacts are noticeable or you just aren't able to hear the artifacts, either because of unfamiliarity or bad hearing especially as you get older. I've done blind a/b tests with my equipment and over 20 samples proven that I can tell a difference with a high degree of statistical certainty between 320kbps and FLAC (try http://abx.digitalfeed.net/list.html) Lossless vs 192kbps or lower is just too obvious, I think most "audiophiles" like yourself should be able to tell the difference with a high-end set of headphones or speakers. 320kbps really only makes a difference for me for classical recordings as a violinist who can hear every detail with audio equipment thats pricier then what 99% of people are willing to pay for that extra 0.1% of audio fidelity. Alot of enthusiasts are also audio engineers who are very familiar with compression artifacts and audio mastering