I'm looking at replacing my PC's main HDD very soon. It's slow, clicking, and I want it replaced as soon as financially possible! I have never gotten to grips with the available Hard Drive on the current market - are there any terms and mechanisms I should keep my eye out for? It's for housing my Windows installation, so i heard... a "black label" is reliable for speed etc? I see many "green" related HDDs, I am guessing these are more friendly to the environment?