I'm suprised this thread has ended up how it has...
The 6.0 is a stellar engine. Yes stellar. It is pretty much the last of the "loud" diesels. In my experience in the field it can get you ANYWHERE if youre equipped. I've used it welding in some hairy places but it will get you there better than any dirtymax or common-rail. My '05 is basically stock aside from the 4" turboback and has a beautifully clean oasis report (your truck's health history) and still runs solid WITH the EGR.
Stories aside, like mentioned earlier you should tear apart the engine yourself when doing any upgrades/maintanence. No one looks after a truck better than yourself. Delete the stupid EGR. Get rid of the Ford Gold in favor of ELC coolant. Oil changes ever 6-8k (a smart person would swap to a synthetic, injectors are not cheap). Give it the neccesary mechanical updates like the blue fuel spring regulator, STC fitting update, turbo drain/feed tube. Those 3 updates are not only incredibly crucial, but only about $200 in total. Done.
On a side note, I'm curious about the opinion of powerstrokehelp.com. I remember parusing through it many months ago but never picked up on anything bad. For the record, I'm no mechanic.