I have owned 2 6.0 trucks. The first I owned from 20,000 miles until 140,000. I had to do the full bulletproof at 95,000 when the head gasket gave out. then I had problems with the worthless injectors that were installed at the same time. other than that and a clutch it was a trouble free truck that was great. I now own another 6.0 with 150,000 miles I bought for $5,000. It was in great shape other than a known blown hg and the coolant system was totally crap. I had the cap off and wen through the whole thing. Any how, I think it is as good as any if it has the right parts installed. If you put the wrong parts on it you will be hating life. thats my 2 cents.
2004 Ford f350 6.0 4x4 king ranch 4" mbar turbo back, sct x4 with php tunes, running full synthetic in every part that takes oil. Arp head studs and egr delete. Coolant bypass and oil bypass.