i'm still having sonic issues with my Super.fi 5EB's, and i've been slagging them off everywhere i go.
i have been told to take 200-250 hours burning in time, for them to reveal their full glory.
apart from the appauling and inconsistant midrange (keep in mind the burn in time) they do sound o.k. I have to say in terms of build quality they as solid as a rck, and with a replaceable cable, they become an interesting purchase.
both the 5EB's the UM1's, (which are next on my list) are around the £100, but i got my super.fi's here
http://cgi.ebay.co.uk/ue-ultimate-ea...QQcmdZViewItem
that's a good price.
i must remind myself that when i first listened to my stax headphones, i could have easily thrown them against the wall, but a little burn in can go a long way. with the 5EB's it's a matter of hoping the mids will warm up.