My view is that unless you have a 3rd generation Intel® Core™ processor there really isn’t a lot of extra value that you can get from the Z77 chipset based board. So unless you are planning to move up to the 3rd gen processors stay it is ok to stay with the Z68.
Intel Enthusiast Team
From what I understand after to speaking to ASUS, there has been some early on bugs with the z77 chipset. I also found out that and I quote "The ASUS P8Z68-V PRO/GEN3 will support 3rd Generation Intel CPU (Ivy Bridge)" If that is the deal, then go with Z68 chipset...seems all the bugs have been worked out and is a solid chipset.