have to chime in... after the sticker shock of looking at the Thule and Yakima options, i finally found a good-enough solution for me: the Malone MPG202 (58") rack from a made-in-the-USA shop up in Maine - less than $100 shipped via a large on-line retailer who is best known for books...
the rack features four locking 'towers' and rubberized clamps (also comes w/4 extra gray rubber spacers, which i used):
unlocking the tower and dropping the keyface reveals a hex screw access (rack comes w/2 keys and hex bolt):
the 58" bars are square, but fine for my purposes; a bit of a low sound at 35mph, but goes away at 55mph:
i'm *very* happy with this inexpensive solution - rack is solid and perfect for my simple needs (a ladder or hurricane evac support for extra bags)
hope this helps someone out there looking for a cheaper, but functional and sturdy option