|""But we are talking extreme cold like well below the 0 maybe mark""|
I disagree completely. Starting a cold computer from a COLD START that is much below, say (pick a figure) 40F is probably not a good idea on a regular basis, and with some hard drives, the temperature may tend to be a lot warmer than 40F. the fact is, the bearings in a hard drive were never designed to operate at that temperature, and (at least on older drives) the head alignment at colder temps WAS certainly a real issue.
If your room is cool, as you say, and you leave the machine ON full time, the heat from the machine itself and the head generated by the drives themselves will keep the HDD's warm enough.
One thing you might do, if you are forced into a situation like this (starting a cold machine often) would be to make sure that you force the machine into the bios/setup, and let it idle there for a few minutes. This will allow the drives to spin and generate som warmth.