should i get a: 1. stock turbo 2. N/A and later on replace with turbo engine? most of the MR2's i see for sale have over 100,000 miles so I figure that I will need to get a new engine/transmission eventually, so might as well start with an NA and put in a younger 3sgte engine in. is this a good idea? stupid question but, is adding a new engine/transmission as good as getting a brand new car?