Budget - U.S. $125, $175 hard limit. Used is an option, but I prefer to avoid eBay.
Source - FiiO E10K
Requirements for Isolation - none
Will you be using these Headphones in Public? Nope
Preferred Type of Headphone - Full-Sized, Over-Ear
Preferred tonal balance - Unsure, I think pretty balanced, definitely prefer clear mid-bass and clear treble... I prefer headphones that have soundstage that is clear without having to be cranked up
Past headphones - AKG 240 Studio (55 Ohms). I've listened to them for the last four years contentedly, but with electronic music and heavier post-rock there isn't always enough separation. I've tried Sennheiser HD600 and HD598, both were impressive, but it has been years since I heard the HD600's and I only had a few minutes with the HD598's.
Preferred Music -
Chiptune, Drum 'n Bass, & various electronic: Paint the Skies, Trey Frey,Sabrepulse, Kubbi 1 1, Shirobon
Post-Rock, Other: Long Division, Over the Ocean
Alternative and Other: Jon Foreman/Switchfoot