Looks like the Gigabyte GA-Z77X-UD3H also supports VT-d, although I can't see it mentioned in the v1003 manual:
http://forums.tweaktown.com/gigabyte/48393-does-ga-z77x-ud3h-support-vt-d.html
It's got one NIC: Atheros GbE LAN chip (10/100/1000 Mbit)
Actually it seems like most of the GA Z77 boards may support VT-d: D3H, UD3H, UD5H. I'm now considering the GA-Z77X-D3H and it specifically mentions VT-d in the v1004 manual for it.