I am torn between these two motherboards please help. According to this review by techradar.com the Gigabyte GA-Z77X-UD5H out performs the Asus P8Z77-V PRO slightly and gives the Asus Sabertooth Z77 a run for its money.
http://www.techradar.com/reviews/pc-mac/pc-components/motherboards/asus-p8z77-v-pro-1078650/review#articleContent
http://www.techradar.com/reviews/pc-mac/pc-components/motherboards/asus-p8z77-v-pro-1078650/review#articleContent