Hi newcomer and welcome to the Tom's hardware forum.
The ASUS and EVGA that the previous users mention are very popular but ur question is very wide since all the people think different.
Many users use Gigabyte mobo and for they the Gigabyte mobo is the best but the ASUS users think the same about the ASUS mobos.
Which is my opinion? Currently I have a Gigabyte and MSI mobos, but for ur rig this are the best IMO.
1- ASUS RAMPAGE III Extreme
2- ASUS P6X58D-E
3- ASUS P6X58D Premium
4- Gigabyte X58A-UD5
And ur question also depends of ur budget, so, What is ur budget?