I have the HKS Hipers now and I've been trying to get rid of them in favor of the PE's (Anyone interested let me know). I don't hate the way the Hipers look but they don't fit into the rear valence that's been sitting in my garage for some time now since the Hipers don't fit into them. That's my only beef with the Hipers. Other than that, they sound good and I don't have any other problems with them.