Reviews are mostly valuable for those pieces of equipment that are difficult/very expensive to rent: MFDB, high end printers, scanners,...
Honnestly, anyone living in a reaonnably civilized place will be able to rent a D3 for one day for a reasonnable amount of money (probably around 150 US$) and do in depth image quality test in the context of the relevant usage. That's what I would do if I hesitated about buying a D3.
Since I have zero doubts about the relevance of such a purchase, I'll personnally go straight to the shop.
Regards,
Bernard