I have a 2004 Sport and a bought the Thule racks you are describing and they are still in my garage because they look way too flimsy for my needs.... But, Then again, I regularly put 2 canoes on top... Or a canoe and 2 bikes... Or a cargo carrier and whatever.... If the only thing I were transporting were relatively lightweight bikes, I probably would have used the model you are describing. I chose to go with the heavy duty load bases that strap quite strongly on the rails and then I use the square cross bars in various lengths, depending on what I am carrying.
The set up I use has been quite reliable and even though I have, on occasion, exceeded specified and recommended loads, they have never let me down.
