Well, I just pruchased the Kenko extension tubes. Now to upgrade my tripod.
I have been looking at tripods for about a month now. And this is how I feel:

So many choices with so many prices. I have between $400-500 to spend for the setup.
My problem is that I have never been a tripod user since I don't own a good one. But I do know the benefits of shooting with a tripod. I want to do some macro work as well as being able to attached a long lens for some nature shots. (I don't anticipate the long lens ever being more than a 400mm.) And I don't plan to go wading into water nor do I plan to hike up the Andes.
So any suggestions? I am going to Arlington Camera this Saturday to cash in my Christmas gift from my wife.
Thanks