Terry,
Everybody knows that an ECU remap is going to give better results than a tuning box. Everybody knows that tuning boxes are cheaper.
Are we comparing the prices here or the performance result?
Here is another comparison if you cannot find an independant customer (may be hard for you since you have so many biased cronies backing you business)
Come to the NurBurg Ring and I will meet you there. Bring a stock BMW and fit your super box to it. I will custom tune mine. See who comes out first