Brother has a 95 SHO 3.2L ATX
He is the 2nd owner and the car is stock.
Around 60K miles is on it now and he has yet to have any major problems other than brake issues.
ATX trans normally lasts about 75K miles on the 92-95 SHO's.
It depends on how you drive I think. He learned not to treat the automatic with shame after his last 2 ATX cars needed tranny rebuilds.
But buying a car that is 8 model years old is begging for maintenance costs.
You will have better overalll luck with the 96-98 SHO in terms of quality I would think as it is not as sporty and most likely not as prone to failure. I also think the 96-98 have not been driven hard like the 92-95's.