If you find a Z that has been maintained well and all the maintance has been done at the correct time, ei. 60K, then the Z will last you a long time with no worries. It's the same with any car, you buy a car that has been treated like shit it will run like shit and give out much sooner then then same type of car that has been babied. If I was you I would find a low milage Z that has been taken care of and you will never regret choosing it over the MR2 any day of the week.