I have the oem's. I like the look. But they are noisy. Somewhat less noisy with rack pads. Agree that a spoiler/wind deflector would be nice. I saw one on a post here or on vortex - the guy had attachd a thule or yakima deflector to his oem rack. If I thought I had half the talent, I'd try it.
If you don't have a sunroof you can adapt the thule fairings to work, you need to get some of the aero-bar hardware. In fact with aero-bar hardware jsut about any Thue add-on will work with the OEM load bars. with a sunroof the fairing is not a great fit, but possible if you fab some brackets.
I liked the OEM because of the clean fit/finish (no "generic" bars sticking out of the sides), nice finish caps, and locks are included.