My family made the switch (both business and personal vehicles) from Chevy to Ford, and we couldn't be happier. Damn fine trucks. The 05 is the best yet. I am not a fan of the radius arm suspension, but for a stock height vehicle it works great. Great brakes, great syling, interior and all very durable. They are incredibly powerful, and the rear axle will hold for almost anything you could eever do (44s and an upgraded diesel might break it) and the front axle is the strongest anyone puts under a 3/4 or 1 ton vehicle. Also, the five speed tranny is better than the Allison, and better by far than any of the four speeds out there right now. If I were to buy another 3/4 or 1 ton, it would be a SuperDuty.
BTW, the 6.0 has been fixed, they worked past the problems. Our was finicky for a while, works perfectly now. Nothing like being pushed back in your seat by almost 600 pound feet of torque, thats for sure.
Any specific questions, feel free to email me at my username @AR15.com. I'll take the time because I don't want you to get a Dodge or Chevy