I'm looking at the same 2 Z68 boards right now, plus the MSI G55. I'm leaning ASUS or MSI because I'd like to get a board with UEFI bios.
I haven't bought a mobo in a while and it really makes your choice tough when you look at the reviews on Newegg for ASUS and Gigabyte boards (MSI reviews are not real great either). I know ASUS and Gigabyte have always been top notch mobo manufacturers but, every review you read makes them sound like a crap-shoot.
To be fair, the majority if people who receive a good product don't write reviews so you usually end up reading the reviews from the un-happy people.
One thing about the ASUS Z68 boards, from what I've read on Newegg reviews and other PC sites, the ASUS Z68 boards are extremely picky about what RAM is used. If you go with ASUS, make sure the RAM you buy is on their recommended list for your board.
Awaiting to hear what those who have bought a Z68 ASUS or Giga board (MSI too) lately have to say.