"bungee91" I appreciate the link and it's defintely opened my eyes on the subject. Had I known a bit sooner, I believe I would have opted for something alse like the Opus. I believe that a healthy run-in is required and I'll have the builder do that while I'm present. I'm going to ensure there is more than adequate cooling/venting to minimize any transference of ambiant heat to the PSU also.
As I posted in the other thread, I'l keep a close eye and "pray the PSU is not a Friday or Monday unit".