I just bought a set of the Erson roller rockers from Keith Craft. I'm really pleased with them. They look like they'll be very durable. They are probably the best money I've spent on rockers.
Years ago I started with the OEM stamped steel stuff, then changed to the Comp Cams pieces, and then the stainless steel Shelby rockers. I had a recent valve train issue and sustained some damage to the Shelby rockers. I spoke with Keith Craft and he recommended the Ersons. His pricing for them just several weeks ago came in far less than what I paid years ago for two of the competitors' pieces I mentioned!
David