x2 for the trans - add that price in and your at 17 grand for a whole set up.
The tuff thing is that for people like me with only 29k on my truck - it would be rediculous to swap out for a cummins when my motor still has a whole life left - so its a painful waiting game. Do I slowly build the 6.0 and spend all the money on it just to have it fail over and over as they seem to do from seeing other guys' experiences...or do you sit and wait 3 or 4 more years and save up for a cummins swap which you know will be reliable power. It would be hard for me to justify either spending 10k+ on my 6.0 to have it fail, and then lose a lot of that 10k when swapping - to only spend an addtional 20+ on a swap. As the truck is my daily driver, for now I can't have long periods of down time either.
I think the only way people will stick with the 6.0 past the first/basic round of mods would be if the reliability issues were solved. I also think there is going to be a lot of interest in the the new Ford produced diesel motors when they come out - I know I personally would love to have a FORD motor in my FORD, and also be the only diesel brand truck that literally is powered by their own motor.