Thanks everyone, much appreciated! I'm not 100% happy with these pics, though. Should I expect my camera and lens to produce tack sharp images most of the time or is that a rarity with any camera? Is a tack sharp pic usually only that one out of a few hundred or more?
I'm an advocate of never being satisfied with my shots, that is what drives continuous improvement.
As far as what percentage of shots "should" be tack sharp....good question.
I find that my biggest barrier to getting super sharp shots is me. If I don't force myself to slow down (and perhaps breath), I have a tendency to jerk a little when hitting the shutter and inducing blur.
But another issue is wide apertures and long lenses. The DOF is so shallow that it is possible to have part of your subject sharp and the rest a little soft.