Thank you for responding.

On the question number 1: why do you think so? Even high BP, I can put in the new building (if I even needed). Here I am more interested in his (BP) specifications - not whether they are deteriorating with the lack of an active (fan) cooling, heat treatment is likely to be somewhat different.

What's the catch with metal blades, I do not understand?

In general, Samsung - is good. But Is their HD?