sorry to bring this back from the dead but i know there is not much info for DTA EMS's so i figure i would share.
DTA boxes are very motorsports friendly and widely used in many racing series yet never got very popular for street cars (at least in the US)
I have been lucky enough to work with DTA over the last few months on a number of projects, 1 of which was this K20 in the Buddy Club DC5
http://brewed-motorsports.blogspot.com/2012/11/buddy-club-dc5-touring-car-track.html
Over all the DTA EMS's are another great option along with hondata, AEM, haltech, Motech and many more. When it comes to choosing the best EMS it really just depends on what the car/engine will be used for.
here's the video of the DC5 running the Brewed tuned DTA S60 pro EMS.