I have a Super Z 300hrs; Had some issues but worked them out. I'm considering a second ZTR either Exmark or Hustler. My Exmarks have given me zero problems until 1500hrs (I'm very happy with that) the Hustler so far burnt grass,4 blade switches and a clutch. However, I do like the Super Z very high performance. Everyone raves about the Hustler but they all seem to be new or almost new units I'm concerned over the long haul?