The TT is a cracking car, but mapping it; although once on the radar is no longer an option. I originally bought it with a view to have a dabble with it, brakes, ARB's, map, etc etc.
But I have been looking at options, and keep coming back to the fact that IMO you should essentially buy the car as you want it. Small mods yes indeed, but if I want more performance etc, I will buy a car that has more performance, or offers warranted OEM manufacture upgrades.
Also I want to play on the track, but taking the RS on track days is a no-no for me, call it self preservation, call it lack of adventure but I can't afford to lose circa £40k if it all went wrong.
I want to buy a car that I can take on the track, be insured on the track, and drive home happy.
No wrong or right, just up to you, your money, your choice.
Ps Mr TC you have done in essence exactly what I was thinking of.