Yes, with a big turbo setup, I can understand that you want the car and not just only ecu.
But at the moment I am looking for a basic stage 1 tune, the thing that is custom with it is the optional things I like to have, like: launch control, tfsi coils, SAI delete and maybe some more things.
Those optional things doesn't the tuners here in Sweden offer.
When I eventually do a full big turbo upgrade then I understand it takes a more serious retune.
I custom map every single car, even for Stage 1 tunes.
If you want a good result, it's always best to go this route.