ThurstonX
Headphoneus Supremus
Don't want to fully cross-post, so here's a link to a brief Q701s/K712s comparison I just posted:
http://www.head-fi.org/t/659251/the-akg-k712-pro-support-and-impressions-thread/3390#post_10957832
TL;DR version: the K712s are brighter, and responded well to the foam-covered bass port mod and slight EQing of 2 & 2.5 kHz bands. Q701s might seem warmer due to more hours on them. I was pleasantly surprised by the Q701s. More comparisons to follow.
http://www.head-fi.org/t/659251/the-akg-k712-pro-support-and-impressions-thread/3390#post_10957832
TL;DR version: the K712s are brighter, and responded well to the foam-covered bass port mod and slight EQing of 2 & 2.5 kHz bands. Q701s might seem warmer due to more hours on them. I was pleasantly surprised by the Q701s. More comparisons to follow.