never ask for the best motherboard.
Tell us your budget. And THEN ask for the best motherboard for that budget or lower.
I suggest going with Gigabyte. Their support isnt so good. ASUS support is worst. ASRock support is the best, but their boards are cheaper and the quality is slightly less.
According to this review I would pick Gigabyte.
But I didnt like the VRM heatsinks. So I would at least get the UD5H or UD5 or UD5P or whatever it is. That is the best board probably.
Or get this one:
From ASRock at least get the Extreme6 or better. Get this if you are on tight budget.
If ASUS pick the one I gave you.
If Gigabyte at least the one I mentioned you or better.
I would actually pick the UD5H or something like that. You don't want much vdroop and adding too much voltage than necessary. Ivy Bridge is already so temperature fragile