Everyone goes on about the D800 - excluding mps it is barely to the 2007 1Ds3 standard as an all-round camera
You made my day!
Resolution and DR have direct impact on IQ and yet you compare D800 with 1Ds Mark III.
Even my 2004 1Ds2 is still churning out impressive pictures at 16x12.
My 2001 Fiat Coupé still runs very smooth, you think I should compare it to a 2012 Mercedes-Benz?
Resolution beyond those pixels needed have no impact on IQ. a 10mp picture when printed contains no extra detail whether it comes from a 21mp camera or a 36mp camera. It is the colour rendition and clarity that really counts.
DR on the 1DS3 is very close that on the D800 - particularly in normal shooting where DR requirements rarely get above 10. The 1Ds3 matches the noise of the D800 at 50-200iso
I would be very surprised indeed if there was any visible improvement on a 16x12 from a D800 rather than the 1Ds3 - particularly when the Canons superior lens are taken into account.