I bought Progressive shocks for my CB500 and they turned out to be pretty good. I bought them with the "heavy duty" springs because I knew I would be touring on them. Well, it turns out the springs were not heavy duty enough and began to sag so I replaced them with even heavier ones from Progressive. Other than that poor spring choice by me, the Progressive shocks did in fact hold up to 10k miles of overloaded, two up touring and the bike handled pretty nicely.