IMO you might be better off saving money and go with something more affordable and known quality. Such as ASUS P6X58D series ($250), Sabertooth ($200), or Gigabyte UD3 ($200), etc. I understand that you want the best, but to be frank there is no difference between those ~$400 boards and ~$250 boards under air cooling. The review I linked earlier make that point clear. These super-duper boards usually only differ on the CPU power delivery which is more geared toward hardcore OC (read: sub-zero) community and 3DMark jockeys (read: gazillion NF200 chips for more PCIe lanes).
For air-cooling it doesn't make one bit of difference and $200 boards are no more/less stable than $400 boards, imo. Plenty of folks enjoy 4.0 GHz+ with $200~$250 X58 boards.