Without testing the crosshair 3 I would say the GD70 is the best out of the boards i tested, hence why I got behind it supporting it as best i can. I find peoples expectations are usually more of the issue than the board under performing.
There is 1 bios you guys have not seen for this board, i will ask MSI is it could be released to the forums, its an oldie but a goodie although its totally manual and VERY VERY hard to tweak...it does allow you to set what the board may need or your ram may need though. One bad thing is it was released well before C3 was available..

Its designation is 000, it was officially released to around 4 people after 2 of those testers asked for specific items to be added.

Don't push or PM me, i will ask MSI and respect the NO if that is what they give, if they say yes I will add it to the list of bios files over on the OCZ forum