IMO, why p*ss about with a programmable aftermarket ECU if the OE one will do the job just as well. AFAIK an EcuTEK remap is a fully customisable map for the car you actually have, without buying an aftermarket part.
Now if you have passed the limits of the OE part then I can see the pont in having an aftermarket part, ie so you can have a 1200bhp monster or something... but why would you p*ss about having something like that if you were looking to have something at say 500bhp[1] or less?
[1] - Personally have no idea what figure the OE chip has issue with, actual figures may be higher or lower... see banking BS for more info