I took the risk this AM and installed 565...the difference perhaps is not the build number but rather the branch. TH2 has been a better bet for me on both a laptop and SP3 testing machines. The printer drivers this AM got immeasurable better with 565 and the constant background 30% CPU use went to a more normal 6-10% in quiet use. I know, putting a test build on a first generation piece of hardware on day one of its release is probably stupid , but it worked*. Am happier and happier with this new machine with each passing moment. Then again I have not have any issues that were not occasional issues on my SP3 and the preview builds - no blinking screens, no color changes, etc. But I think I pushed the power button while in draw mode (reverse mounted on the KB) so I did get one unintended shutdown.
*old military saying: trying something new in combat is stupid. But if it works it is not stupid.