Chuck-
It seems as the whole thread is just personal opinion.. Being in engine R&D for a living I would really like to see real world testing between the ECMs that has a set criterion that accurately portrays the benefits and losses of each system. Since you could have 10 people with a lot of experience in each system, rate them and get 10 different conclusions. I "Personally" feel that the new factory systems are king as far as fine tuning and drivability goes, but then again most can't handle inputs/outputs and don’t support universal application... I feel that every system has its own benefits like; Universal fitment, drivability, features, user interface, price, "control-ability", product support, ease of install, table/map clarity, etc.. Just my .02 but then again it’s JUST someone’s opinion..
,Dan