Eric
Thanks for your reply. I did notice that I had to pay more attention to sharpening when I went from a D70 to my D300. As far as focus and depth of field, my technique from way back in my film days seemed adequate. The biggest problem I have is camera shake. I still am always looking for some camera support (if I can find it). I find VR lenses to be very useful if I can't use a tripod or find something nearby to support the camera. I feel the need to go FF for some of my photos, and I was considering getting a D700. But the price of a new D800 is so close to the D700, that a D800 seemed a better choice. But now that Nikon is rumored to drop the D700 price by about $500, the choice becomes more difficult. I don't think that more than 12 Mp may be needed, but I will wait to see D800 reviews.

Matthew