I have an old Mach 5 on my geared mtn bike and a Black comp on my singlespeed. Both forks are great and i havent had a single prblem with either one. I think A2 hit the nail on the head when he said that people buy the less expensive models and then ride them beyond the forks' capabilities. I have ridden Rockshox and found them to feel kinda delicate. Never ridden a marzocchi before, so I cant attest to their quality.