I went for the SH when I bought my car because I wanted the best they had. At the time I was unaware of these web boards and I dont even think Quaife had a LSD availble at the time. Now I drive around with the ATTS light on becuase it trips every other week. I bought the extended warranty when I got the car but so far the sensors that are tripping the code are testing to be good.
Even though I'm not a fan of the problems with the ATTS when it's not working I know. The car has much more understeer and seems twitchy until I push it to the point of plowing. If I was going to buy a used lude I would NEVER buy the SH.