Just checked Ziptuning.nl:

The use ODB/diagnose reprogramming of original software at 599€, additonal NSA engine warranty as of 178€ :

Power advancement form:
210kW/286hp to 243kW/330hp and 580Nm to 710Nm
Topspeed from 235 km/h to 256km/h

The torque they are promising is quite high, they are going to send me an email with the measured accelaration times between tuned and non tuned car.