Asrock. As someone with contacts at Asrock I can legitimately say if you encounter a problem to do with whatever Asrock board you have they will do everything they possibly can to help. I also have a Asrock P67 Extreme4, Z68 Extreme4, Z77 Extreme4, 890FX Deluxe3, and a X370 Falal1ty Gaming K4. All boards are rock solid and still running strong to this day. By far Asrock boards are the most reliable boards I've used in 22 years in the IT arena.
