Greatly impressed by the image quality, especially at high ISO. I'm going with the D4 (based on my shooting needs) but would love to eventually add a D800 for landscapes, etc.
Thank you for your first impressions and sample gallery.
I printed two of the 12800 photos at 8X10 (after adjusting in Lightroom 4) and I am quite impressed by the detail and low noise.
Looking forward to the same preview of the D800.