I've set up a new thread as the topic has changed now. Any advice on what hard drive(s) to get here please:
http://forums.overclockers.co.uk/showthread.php?t=18503270
http://forums.overclockers.co.uk/showthread.php?t=18503270
All my drives marked "WD" had badblocks during my whole life, maybe one was Seagate, rest was completely fine.