Managed an Asrock Z77, i7 3770S passive with AXP-140, Nexus 530w and ATi 7850 without mods.:) Using the stock fan connected to a Fanmate turned down so it's pretty much silent, temps aren't over 45 idle.
Looks like the new Intel Z77 based Mini-ITX boards are surfacing from Zotac.
Lets hope they are not plagued with BIOS issues like the current Z68s.
http://www.techpowerup.com/158581/ZOTAC-Also-Displays-Intel-Z77-based-Mini-ITX-Motherboard-Geared-for-Overclocking.html