Re You can only have one. Which would you choose
 

RLSH700 stated this might be better as a poll, so I'll post it but with a few changes

OK you have a car, non specific type, model, year, make, etc, you have enough money to do one of the fallowing:

Which would you do?

RE: Re You can only have one. Which would you choose
 

What I care about mostly is the engine. When I buy a car, I do enough research to know for a fact that I want that specific engine; therefore, I would just want to make upgrades to the engine.