>I have to say, even pixel peeping on the d7k I have not been >concerned. Any problems have been user error for me.
I'll admit, I'm a resolution freak, and commonly print/sell images that are 20x30".
I love looking at 100% size, BUT have found occasional user error (slight motion blur) that I'd not have seen on my D200.
One thing that's helped me is the fact that I used to shoot Kodachrome 25 all the time, and had to develop approaches to hand-hold at 1/15th. This has translated very well into the DSLR technology, as I still prefer the lowest ISO at all times.