I used to have a strong preference for Asus, but only becuase they included their q-connector for the front panel connectors. I have a p6t deluxe in my main PC and am a little dissapointed that they haven't released any Win 8 drivers for it.
More recent builds have used Gigabyte, but I have had some odd, seemingly driver related, issues with one of those builds.
So, for hardware Asus or Gigabyte, but I wouldn't confine myself to only these manufacturers. I look for the cheapest board that has the features I need / want.
For driver support, I'd have to say I trust none of them.