@Aubélia: Thanks Aubélia!

@Gérard Beullac: Hi Gérard. I think what you've suggested is the best solution and in an ideal world I'd have kept my D700 too but it's been sold to part fund the new D800. Although the bodies of the two cameras are similar, in use they are not at all alike with different strengths and weaknesses.

Re computers - I suspect this issue has been exaggerated a little as my laptop is nothing special - it's a 2 year old 1.9Ghz dual core CPU with 3 GB Ram (no graphics card) and, although the 200mb 16bit Tiff files slow it down noticeably it still handles them without too much trouble.

@Stefan: Thanks Stefan!

@Richard: Thanks Richard!

@Mehdi Monadi: Thanks Monadi!

@Andrew Atkinson: Hi Andrew. To be truthful I hadn't noticed a big difference compared to my D700 and the original NEF file for this image still has a pronounced blue tone to it (as always, it's easy to correct in post processing). I've always used auto white balance on my cameras but I notice that with the new camera there's an option to dial in any specific colour temperature - have you tried that option yet with your D800?

@Andrew Atkinson: I know what you mean about the Hi-tech!
The best I've used so far is when combining a 6 stop B W filter with the Lee 10 stop as the brown and blue tints cancel each other out to some extent.
The worst is the one I currently use which combines a Hitech 6 stop (in their Lee holder fit) with a Lee 10 stop but the advantages of simplicity and speed of use far outweigh the poor white balance.

@Veronique: Thanks Veronique - normally I don't really talk about image quality as I'm usually far more interested in things like image content, composition, light and artistic interpretation but the new camera is such a big step up from anything that I've used previously that I though it needed mentioning.

@JacklineG: Thanks JacklineG!

@Ted: Hi Ted, the D800 is not as forgiving as the D700 or D40 for low light handheld shots using low shutter speeds. The best advice I've seen on-line regarding using the D800 handheld is that to get the same degree of sharpness that you are used to seeing from a 12mp DSLR at 100% viewing on a PC monitor, you'll need to use a shutter speed that is 1 stop faster.

As an example when I used the D700 with my 16-35vr lens my minimum shutter speed for normal handheld shots was 1/15th second - following the above advice you'd need 1/30th second.
If, however, all you are doing is small size prints then you wouldn't notice the small lack of sharpness in a 36mp D800 photo and you can use your normal shutter speeds - the above advice only applies if you want images that look completely sharp when viewed at 100% or printed to a large size.

@Ana Lúcia: Thanks Ana!

@Lluís: Thanks Lluis!