I just got mine today from TTVJ. Nice packaging, nice fit with the medium-sized soft sleeves, easy fit, lack of a right-angled plug on the cable and extension cable, excellent/deep/rich/not-bloated/detailed bass. The bass is what I noticed first. I like the bass, amped, a lot with my e4s, but the bass on the E500s is like sharp and yet rich (the best of the e4 & e5; I have all three). I liked the sound a lot unamped with my iPod, and then plugged into my AE-1. Hiss notwithstanding, I loved the sound even more. Richer, more detailed, more oooomph. Tool "Stinkfist" was really "alive." Love that sheet.
Anyway, the mids and highs were good, too. A nice balanced sound. Improvement over the e5s in that the e5s, in contrast, seem a bit bass-heavy, and the e4s are just a thinner sound, but the e500s have more balance, and oh the bass.
I would like to add more, but these are initial impressions.
- walk