Don't listen to Ken Rockwell, he's a bit of an idiot.
I'd go with fast glass. If you haven't got the body yet, go for the D7000 or even a D7100. Grab a speedlight too. Practice lots as well. 70-200 would be great or even a 24-70 as with those bodies they are crop sensors so you're going to be getting a bit extra reach with your lenses.

