I know the 6.7's had a few regen problems early on, but the website seems to have gone quiet on those types of issues since the new Rev A/B flashes came out.

If you want to feel better about buying your 6.7 instead of a Ford 6.4, take a look at the info from the Powerstroke registry website pasted below:

Latest Technical Information
F-Super Duty vehicles equipped with the 6.4L diesel may exhibit one or more of the following concerns: lacks power, leaks oil, fuel or coolant from the tail pipe, abnormal tailpipe sediment, white smoke or ash, exhaust smell, knock or rattle, elevated idle, surge, crankcase oil level over-full, MIL On, DTC's P0087, P2291, P0263-P0284, P0300-P0308, P1336, P132B, P2262, P2263, P244C or P244D. If you are experiancing any of these concerns, then take it to your dealer and have them refer to TSB # 07-8-9

Polls
How do you rate your new 6.4L Diesel?

20.5%
Dissatisfied

27%
Not sure yet

32.6%
Very Happy

19.9%
Yes, so far

Total Votes: 307

Most of the 6.4's are getting mpg in a range of 10-14 at best after putting at least 5K miles on them, some are much worse.