if you can find a 300zx in good shape ( maintance being taken care of) you should be able to run it clear up to 200k+ w/o any major problems. It sounds like you might have lucked out on your Z. But if you arent really into the styling of the 350z i would steer clear. If i were in your shoes i would def. search for a good TT but if no luck i would save a little $$ and opt. for the new vette. Just my thoughts but good luck in your choice!