How many miles are on your car? What engine do you have? Has the engine been rebuilt? Well maintained? Burn oil? I am asking b/c you may want to do a rebuild w/ a few NA parts and get a good baseline to do a solid turbo build in the future. It's really a matter of your taste. It doesn't sound like you want to be a street racer, drag racer, serious autocrosser, or anything like that, so just think about what would make you happier. Simple as that.