Hello AiredaleBuffs,
I installed a ProRac roof rack system on my 2007 Matrix. It's a track-mounted system that requires permanent attachment, which I did myself. It comes with 2 oval profile crossbars that can hold up to 150 lbs. So far I have used it to haul 2 kayaks weighing a total of 85 lbs with no problem. Check it out at
ProRac Systems Inc. and look at the Pro-File rack system. The aerodynamic crossbars are very quiet at highway speed. Note: the kit comes with self-tapping screws to mount the tracks to your roof. The standard tracks are 5 feet long, which I felt was too long for the Matrix, so I cut mine to 46 inches--the tracks are aluminum so you can cut them with a hacksaw.