AEM or Unorthodox Racing?

Which one to get? The AEM kit does not have a crank pulley because of the reports that the UR crank pulley puts unnecessary wear and tear on the shafts. AEM pulleys are bigger and lighter than the stock pulleys so they are supposedly more efficient, plus you don't need t remove the torsional vibration damper. I think UR's method is to make their pulley's smaller and lighter than the stock ones. Which one is better? Does anyone have this on their car? Any experiences or opinions?