I've used Yakima racks for years (20?) on three different vehicles, and I've been more than happy with them. I mostly haul canoes, lumber, dog crates, and other stuff - not bikes, so I don't use any fancy-shmansy attachment gear - just tie it down with ropes or straps. Consider the width of the bars carefully - just to make sure they're wide enough to handle whatever you need to carry. Also consider whether you want it so wide as to knock you senseless in the head everytime you get out of the vehicle (spoken from experience).

I've been told that one of the benefits of the round rack is that attachments can be attached at any angle, and you're not limited to the angle at which a rectangular rack sits on the vehicle. I used rectangular wooden racks for many years before the Yakima, and had no problem in the rectangular world.

I would guess either would do you fine. In that case I'd recommend buying an American-made product (note flag waving).

Ken