If your getting heavily involved with doing your own tunning you might also want to consider Hymee's Protuner, I will be recieving mine in about 2 weeks, if not and you dont want to dive deep the MM Cobb may be a cheaper solution. The Protuner is a little bit more expensive but doesnt require an addition calibration charge,,, Look into both, they are both great and fairly competative products,,,
http://www.performancedesign.com.au/...pro_tuner.html