This is exactly what I wanted to know. Been hearing to many "oh yeah, a mate's brother's girlfriend's cousin once had the shim fly out and kill a baby" stories.
I'm planning on getting the Tomei Poncam Type B cams.
"PONCam Set Type-B, Exhaust Duration: 260, Exhaust Lift: 9.15mm, Intake Duration: 260, Intake Lift: 9.15mm"
I can't see those being too aggressive since Tomei list them as "drop in".