I've been in the market for a new roof rack system since I sold off the one I made a few years back. I've looked at the mega warrior for Yakima and Thule and couldn't pull the trigger on a $400 system and another $100 for the attachments to fit my 99 4runner.
I just purchased a Curt roof rack system and extension from amazon.com and had it out of the box and together in about an hour. it was very well manufactured and 95% of the holes matched up perfectly. The other 5% needed a little force but the bolts did go in and every thing lined up properly.
The mounting system is somewhat universal and can be used on round and square tubes.
I did need to reverse the forward cross bar to add the extra support for the front of the rack.
It measures 62"x37"x4" with extension installed and 41.5"x37"x4" with out
Overall for around $210 for the rack and extension I felt it was a good buy and would recommend it.
Here are the amazon.com links