Hi Dave,
First off it depends on your emissions laws. Having and not having the EGR could be the difference between passing and not passsing inspection based on where your friend is located. If emissions are an issue and or your friend is insistent on "saving there planet one truck at a time", then I would recommend the bullet proof EGR. If it where my decision, that EGR would have been in my junk-pile on the shop floor a week after I owned the truck with a delete kit sitting in the original place.
Here is something to keep in mind. The problem with the EGR on the 6.0 motor lies within not only its build, but also a very fine balance between your coolant temperature, and your oil temperature. I high variance between those 2 temperatures is what leads to the units failure. The design isn't the greatest either, but ultimately, to keep the EGR on your 6.0 alive, those 2 temperatures need to be within + or - 10 degree's of each-other.