Just for a bit of a laugh, picture this... Take your car as it was when it left the factory, completely stock. You're only allowed to modify 3 things on it, no more and remaps are not allowed. What would you choose? Start by stating the car you have.
I have a 2012 Golf R. Personally, I'd opt for anti roll bars, a high pressure fuel pump and a Haldex controller. Get the engine running as best it can and then make sure the chassis can use all the power all of the time.
What about you?
EDIT: Added no remaps into the title...