In retrospect I should have gotten the RallyArmors. Originally I was going to take the BRZ on a RallyX event but got rained out.
It doesn't look so bad with the OEM ones, but its not that aggressive. One thing though, the driver's side fender apparently collects a bunch of junk. The passenger side was clear. I think there is drain on the driver's side. I'll have to double check.