My experience with the Zotac H67-C-E has been a little different, although I'm not sure which BIOS I'm on - will have to check this out later.
Hardware: Zotac H67-C-E + i3-2100 (i5-2500 on another build scheduled for next week) + super old Geforce 9300 GE low profile (to be replaced by a Radeon 5450 if HD2000 support doesn't get hacked in soon).
Using iBoot + UpdateHelper + Multibeast 3.8.0, I was able to get the following install stages working (I went through SL first just to make sure I had a working base platform):
1. Base install using 10.6 DVD image + iBoot
2. 10.6.8 via combo update + iBoot + UpdateHelper
3. 10.6.8 + Chimera via Multibeast 3.8.0 (EasyDSDT)
4. Lion (installed on separate partition)
5. 10.7.1 via software update + Chimera via Multibeast 3.8.0 (EasyDSDT)
6. Ethernet via Lynx2mac's 81xx driver
7. Working on audio when I next have some free time, but I already have a USB audio controller
I'd previously spent 3 weeks fighting an ECS H67H2-I that I picked up at a good price. I gave up and sprung for the Zotac because of tetsu81vn's thread here:
http://www.tonymacx86.com/viewtopic.php?f=54&t=29696
Key considerations for me:
1) USB3.0 (GA) vs mini PCI-E (Zotac). Zotacs typically use VLI chipsets for USB3.0, which don't have OS X drivers available. I was seriously considering the GA because of Renesas driver support. That said, my primary machine now uses a GA H55N-USB3, and I'm in that small group of users who can't get their USB3.0 drives to stay mounted, so I figured I would go with the Zotac this time. The i3 build (for my wife) gets the Azurewave mini PCI-E wifi card swapped out for a $15 Broadcom 4321 native-Airport card off eBay, and my i5 build might do the same with a mini PCI-E -> USB3.0 card.
2) K vs non-K processors. Yeah I know this isn't a board level issue. My i5-2500 build will include a Radeon 5770, but the i3 currently uses an old GF9300 because it's hard to get the i3-2105 (in fact, any xx05 processors) where I live. I might give in soon and replace the 2100 with a 2105 just to get HD3000 and do away with the discrete gfx card.