I was just a little confused when Yakima told me the roof bars from factory on our VX's were not designed to carry anything more than a pair of ski's and some other flat light weight items... Even after I read to them the 110lb weight rating printed on their bars the person kept telling me it wasn't designed to carry anything as large as a bike.
I saw the hitch mount racks with the channels for the tires but like you said, they are very pricey.