Well I took the plunge today and ordered a SCT Xcalibrator 2 from ID today. I already received the tracking number My truck has 27k miles on it and I am feeling more confident with my 2004 6.0. I will eventually upgrade the exhaust and gauges. I opted for the economy, tow with jake brake, and street tune and plan to run the street tune. I don't tow anything at this point. I can't wait to see the UPS guy. From what I hear I will be able to tell a little difference with this upgrade....