I've got an 04 6.0L - eventually every owner will have to replace the injectors (100-150k is the usual limit for factory injectors).
At 100k i had a leaky egr cooler (there are easy fixes/block offs available) - no big deal.
A lot of the head stud issues are unnecessary imo - I've never puked coolant but then i haven't run heavy hp tunes on mine either....most of the used trucks should have had most of these fixes applied if the owner.
Ive still got our 6.0, its a great, VERY reliable truck and even with fairly minor fixes its STILL cheaper than a new $75k truck.