There is a very nice review of the K-1 by Joe Farace in the October issue of Shutterbug magazine.
The final paragraph contains this:
Quote: ...I don't like to spend the reader's money and usually point users of existing camera systems to stick to new cameras from the same manufacturer' system. But the impressive Pentax K-1 has me changing my mind about that. If there were ever a traditional-sized DSLR that could get me to dump my existing DSLR rig and change systems, the Pentax K-1 would be it.
Now all I have to do is convince my wife that I need one.