70k miles too many miles to go FI? I want turbo but if i can still do SC at that mileage i'd do SC but would rather have a turbo if possible, opinions, thoughts etc.

i need the car to last over 100k like 120-125 would be the expected life range, and no i do not beat on the car, only when i bring it to the track and when i want to test a new mod, or once a week during my night time drivings ;)

As long as your not feeding it som ungodly amount of boost like 20 lbs or driving it like a rally car you should be ok.