So I am thinking that my current HDD's are gone to crap... I am looking to get a boot/main drive then a back up/storage drive. I currently have a WD black 640 and a 1TB. I see a lot of new HDD's are 6.0 gb/s but my MB is a 2 year old EVGA so does that matter? Any suggestions on a new main drive and a storage drive? How about 2 of these: Newegg.com - Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive or maybe one of those and one of these: Newegg.com - Western Digital Caviar Black WD7502AAEX 750GB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive