I believe that the 6.0 is going to be around for a long time. 7.3 Superduties are commanding a premium with 150-200k miles on them and the 6.0's are dropping in price.
Admittedly, Ford should have done what Navistar did and mandate coolant filters.
Will I own a 6.0? Maybe one day if my needs require a diesel. Right now I could buy a really nice 06 F350 SuperDuty Crew Cab Long Bed dually 4x4 in King Ranch with about 100k miles for $22,000.00 asking price. I would do the following to this truck immediately.
*BPD EGR Cooler
*BPD Oil Cooler Kit... (replaces the engine oil cooler with an air to oil cooler and sends coolant straight to the EGR cooler)
*Coolant filter
And thats at a minimum.
Thanks!
Jeremiah