I chose the bogen 3221 which is very similar to the 3021.
The reason I chose it, besides price, was the removable center column. By mounting the head on the tripod without the center column, the tripod is of course lighter, but more importantly it is easy to to set the camera at almost ground level without resorting to hanging the camera upside down from the center column. Even without the center column the tripod goes high enough for me (i'm 5'8").
If I had more cash, I would choose a carbon fiber version for lightness, but this tripod has proved enormously flexible as far as positioning the camera and I think I made the right choice for myself.