Had a horrible experience with a Zotac board. Their customer support is the very definition of unhelpful. Took five days for them to just tell me to RMA the board after repeatedly instructing me to do things I'd already done days before (which I explained in my first email). The customer service rep had a bad attitude as well, like it was some huge inconvenience for him to take two days to send me a form letter response.
They're also bad about refusing to honor rebates until you involve the Better Business Bureau (seriously, go look at their BBB page).
I'd really recommend going with a brand that's not going to screw you over if things go south. I just can't stress enough how much it sucked to deal with these people. Avoid at all costs.