That would be the RSX line. They don't seem too bad but I went with 5000s in mine and they work just fine for me. But it's not a DD so I don't drive it enough on the road to get annoyed by the stiff ride. It does gives me quite a jolt when I go over the speed bumps at Home Depot.
my friend had the 5000's on his 94 z71. it rode pretty good on and off road. i like em, i was gonna get those but i went with skyjacker instead. yeah, i had a brain fart and couldnt remember the line the self adjusting 9000's were in. thanks for reminding me.