thanks for the info... I'll have something to read up on
back to the S500. i think my unit is burning in quite nicely. when i first got it, i thought the mids were a bit laid back. it's now coming back. it could be my brain getting used to the phones though. there's quite a bit of details in these. i am still using it stock cause it's quite comfy to me (as compared to my V-Moda M80).
Nothing wrong with using it stock, despite all the mods you see here in the thread. I use and enjoy mine stock.