There's a poll on Nikon Rumours at present, asking if people prefer the D800 as it is, or if they would rather have it with the 16mp sensor from the D4. Currently 56% appear to favour the 16mp option...... Apart from the fact that very few people have any hands-on experience of either camera, I wondered what people here thought? Personally, I like the prospect of the '800 as it is, because it gives options in the range. In another thread, however, I did suggest the reverse - that the D4 should be available as is, or with the 36mp sensor (effectively replacing the D3s and x variants). Still saving the pennies.... I'm about £2390 short at present!