Yeah, I think we've pretty well determined that, as far as IQ, the A900 and D3x are different beasts with different strengths. I believe Marc was referring to the camera body, in which the D3x is surely top of the charts. The A900 is quite a match in build to the D700, IMO, but the D3x is a different matter. I'm in agreement with Shelby that the A900 ergonomics are perfect for me.
Shelby, I'd be curious to learn more about your AF problems. Is it an outside AF point issue?