$500 shouldn't be a problem if you check the forums regularly.
My Yakima set-up:
Front bar is Q towers and fairing and the two rear bars are control towers (I think) They fit inside the factory rack tracks.
I had the Q towers from my '89 pickup and the control towers were supposed to be Q towers but they were not once they got to me (friend picked them up off Athens CL) Did not know what I would use them on then when I bought the 4runner I thought it might work so I tried them and they worked great.
Craigslist is the place to look for Yakima parts. I need to find another 2 Q towers for my T100

The clips for it are on the way, eBay $19 shipped for 4 clips, cant beat it. If you go with the Q towers just be sure to measure and get it setup right, I had a friend who put one on his '09 Altima and he didnt measure it out and it came off going down the highway. Tried to get Yakima to pay for the damages and they told him he had it 1/4" out of adjustment. The fairings are worth it too, they really cut down on wind noise.
We have a RocketBox too, its an older model, but I like the looks of it more than the newer ones.
Rack made it on our 7K mile strip this summer.
Moab: