Thank you for your replies. I was not oware (aware?) of the fact that the D7000 also has focus points like the D5100, rather than focus squares (like my D60). I did get a chance to look through a D5100, but not a D7000. The focus points are small and somewhat dim. Focus visibility is better on the D60, but I guess Nikon had to reduce the size of the squares to points in order to accomodate the increase in focus points.
So the visibility of focus points is not an issue when comparing the D5100 to the D7000, because they are reduced in both cameras, compared to the D60.
Add a new twist to the choice between a D5100 and D7000: the D5200 should be shortly available. Perhaps a windfall from the D5200 release will be a reduction in cost of the previous two cameras.
I didn't have any of these decission problems when I had my little Sony point-and-shoot.