Verdier' s motor Upgrade

Hi

It is possible to replace the motor of the Verdier by another for 2000 Dollars ( GT audio In UK) wich seems to increase the performances of it .

What do you think of it ?

It is also possible to get a PSU battery ( 2000 dollars also) for the classical VERDIER 's motor unit ,

What is the best way to do in your opinion to obtain the most important increasing :

Changing the motor unit first or keeping the Verdier's motor and take the PSU battery supply

Thanks

Tenmus